Pratique du Shadowing: What Actually Happens When You Die? - Apprendre l'anglais à l'oral avec la vidéo
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Head over to the Kotzkzak shop, and now, snuggle up.
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The video is starting.
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Your heart beats one last time, jerks a bit, and then nothing.
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Your blood goes from roughly 5 kilometers an hour to a full stop.
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for a split second nothing changes your body is still buzzing with activity you're awake
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and alert your lungs are still filling up and your chest is rising
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but it will only take seconds for the cascade of death
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to begin what does this actually mean death is not a switch not a single moment no sudden transition
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you're a complex self -organizing society of 30 trillion individual cells.
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Death is a complex sequence of irreversible events that slowly make you merge with the grander universe again.
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Let's die together and witness what exactly happens to your body as you shut down.
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What does it actually mean to die?
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In a sense, death is all about a lack of oxygen, a chemical knife
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that animal cells use to split sugar molecules to gain the
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currency of life chemical energy bound in atp your cells each combine millions of sugar
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and oxygen molecules each second
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so your body is built around constantly pulling oxygen from the air loading it into your blood
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and distributing it to every cell of your body this process is so crucial
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that over 80 percent of your cells are exclusively devoted to
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carrying oxygen in an iron cage your red blood cells
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and this is why the death cascade usually begins with your brain heart
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or lungs if your lungs fail oxygen can't be harvested
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if your heart fails it can't be distributed and
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if your brain fails neither can continue working wherever death starts
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your brain is usually the first part of your body
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that dies it's your most oxygen
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and energy hungry organ running quadrillions of operations each second less
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than 30 seconds after your heart stops the electrical communication between the different parts of your brain begins to fade
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you think your last conscious thought and faint that's it silence just you
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and a question did i make the most of my life did i make a difference in our story
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you did your work made this world a tiny bit better you loved it
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the better your career might be your biggest opportunity to leave
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this world a better place than you found it to make the most of it sign up for their newsletter
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sent straight to your inbox at 80 ,000 hours .org slash in a nutshell.
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And now, back to your dying brain.
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Neurons are biological electrical wires with almost no sugar storage and especially vulnerable to a lack of energy.
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Like all cells, they're bags of molecules and water separated by a delicate membrane from their surroundings.
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This membrane is an extremely active, high -tech molecular machine, constantly monitoring and guiding millions of molecules inside and outside,
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maintaining a fragile balance, which needs loads of energy.
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As soon as a neuron gets low on energy, it starts shutting down non -essential processes.
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But as its reserves run out, the membrane stops working and the outside invades.
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Water and salt ions begin to diffuse in, causing the cell to swell.
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This is bad.
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Neurons membranes actively balance out different ions to maintain a potential of literal electricity that they use to send and receive orders.
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When too many ions rush in, the electrical balance collapses, the neuron goes dark.
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As the membrane fails, the neuron spills ions onto its neighbors, causing their electricity to fail, and they go dark too
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but it gets even worse the dysfunctional membrane starts absorbing massive
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amounts of the most dangerous iron of all calcium useful in small doses
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it now turns into a killer inside the neuron it activates enzymes
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that break down vital cellular structures damaging it beyond repair the failing cell goes into panic mode
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and vomits neurotransmitters onto its neighbors they have a double effect
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They scream at other neurons to get more excited, forcing them into electrical overdrive, speeding up their eventual collapse.
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And they order them to take up even more calcium.
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Normally, this is part of their regular signaling, but now it only makes things worse.
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A deadly chain reaction is unleashed.
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Dying neurons destabilize their neighbors, spreading electrical failure and death.
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A slowed tsunami of death is spreading through your brain at the speed of a few millimeters per minute.
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Are you experiencing anything in this phase?
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Maybe.
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There are reports of near -death experiences, and your brain is certainly flooded with chemicals that create a final surge of desperate activity.
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But it's hard to tell because in this moment your memories, dreams and identity are erased from the universe,
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as the structure that made you you is starting to turn into a gooey liquid mush.
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Will you go on to exist in some other way? well
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maybe the truth is nobody knows anything for sure in less
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than 20 minutes your brain is irreversibly lost no more signals
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and orders arrive anywhere else in the body now each organ
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and tissue is left on its own without central coordination many societies
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and legal systems treat this as your death at this point you can still save a few lives
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if you're an organ donor but the rest of your body is on a tight timer.
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The death cascade continues on.
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The end of your heavy machinery.
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The blackout spreads to your heavy industry.
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Organs that perform continuous, demanding work like your liver, kidneys and your stopped heart go into survival mode.
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They have one key advantage over the brain, large reserves of sugar and an emergency generator.
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The chemistry is complicated, but in a nutshell, they can get energy from sugar without oxygen.
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Though way less efficient, it buys them up to an hour of precious time.
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As your organs' cells switch from regular breathing to the emergency generator, some of their genes ramp up their activity,
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activating machinery to respond to stress and repair damage to survive as long as they can.
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But for many of your cells, the stress becomes too great.
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They use the emergency system to destroy themselves in a quiet, orderly way.
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For the cells still trying to hold on, the emergency energy comes at a huge cost.
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Without oxygen, sugar is broken down incompletely and turns into lactic acid that degenerates their insides.
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Eventually, either their energy reserves run out or too much acid accumulates and their internal machinery breaks.
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Some are tiny sacks of digestive enzymes that dissolve anything organic.
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As these sacs break open, the cells dissolve in a corrosive mix of acids and rogue enzymes.
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Their membranes break down, the cells swell up with water and burst,
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showering their neighbors with the same deadly mix of chemicals that killed them from the inside.
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At the same time, the severe energy depletion has reached your muscles.
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Paradoxically, they can't relax anymore.
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The fibers within them need energy to let each other go, and now they lock up.
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Starting in your eyelids, jaw and neck, a wave of stiffening works its way through your body, turning meat to stone.
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Even the tiny muscles around your hair follicles lock up, giving you your final goosebumps.
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Your most important muscle, your heart, is forced to slowly contract one final time.
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A sad echo of your heartbeat as your blood turns deeply acidic.
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Which leads us to the third and creepiest act of this drama.
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Your necrobiome emerges.
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Your body, mostly your gut, hosts roughly 30 trillion bacteria.
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Friendly symbionts that break down fibers, produce vitamins, or keep hostile bacteria in check.
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But they're not actually your friends.
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All these microbes are strictly confined behind the gut lining, held off by physical wool and immune cells.
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But an hour after your heart stopped, this border is crumbling.
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Your body is carbs, fats, and proteins.
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food first millions then billions break out of your intestines through the apocalyptic highways of your lymphatic system
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and acid -filled blood vessels your microbiome turns into your necrobiome
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but hold on there's still resistance within your body the last
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remnants of your immune system are desperately fighting back built to thrive in the most extreme oxygen -starved regions of your body,
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your immune cells survive long after you've stopped breathing they don't need a complicated organ structure
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or orders to work even when the body is dying around them
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so in a final attempt to save you they fight
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without blood flowing their communication with each other is lost their
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once mighty army is scattered across your giant body soldiers call for backup
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and for help but their signals don't travel and
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so they fight a lonely last stand micro battles imperceptible even just a millimeter away
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until their exhausted little bodies can't go on anymore after 24 hours your last immune cell finally dies
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there's also no happy ending for most of your thriving necrobiome
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for most of these bacteria the outside's oxygen is toxic by dissolving your body
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they're working towards their own end without knowing it the death paradox
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but even in this barren landscape of your blood
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and organs a few final holdouts remain microscopic glimpses of life
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your red blood cells have shriveled up like sickly purple raisins
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but the most sturdy ones survive up to a day
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or two and like puddles in a drying lake pockets of cells here
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and there are still alive in the outer suburbs your skin
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and some connective tissues never needed much energy in the first
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place your genes were built over billions of years of evolution to keep you alive
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and the news of your death has not reached all of
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them yet many cells are still translating your dna into the
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building blocks of your past life long after your death gene activity in your blood
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and organs rises and falls in coordinated patterns frantically trying to activate stress responses
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and repair you some of those genes will remain active for days
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and finally deep within your muscles
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and bone marrow stem cells trigger a survival program slowing down their metabolism
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and entering a sort of deep sleep just for the tiniest chance
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that there'll be a time to rebuild your body
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it will take weeks for the last of these survivors of a fallen planet to die
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at this point all of you is completely dead but
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when did you die
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when your heart stopped your brain died your final defense is collapsed we can measure
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when organs fail when neurons fall silent when the body stops
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but life is more than the sum of its parts and
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so the death of you the exact moment you disappear remains a mystery
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Every purchase supports our channel and lets us make videos for free for everyone.
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Thank you, and shh.
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Have a very good night.
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Vocabulaire et conseils d’expression pour cette leçon
Cette leçon d’expression orale s’appuie sur la vidéo « What Actually Happens When You Die? ». Les mots qui reviennent le plus souvent : cell, energy, oxygen, brain, neuron. Cette vidéo contient 140 phrases et 2117 mots à répéter en shadowing. La partie parlée dure 13:41. Le locuteur parle à un rythme naturel d’environ 155 mots par minute, proche d’une conversation courante. Seuls 78 % des mots font partie des 3 000 mots les plus courants en anglais, le vocabulaire est donc exigeant.
Vocabulaire clé de cette vidéo
15 mots de la vidéo à retenir, avec leur prononciation et leur sens :
| Mot | Prononciation | Sens |
|---|---|---|
| oxygen nom | /ˈɑksɪd͡ʒən/ | oxygène |
| organ nom | /ˈɔːɡən/ | organe |
| membrane nom | /ˈmɛm.bɹeɪn/ | membrane |
| acid nom | /ˈæsɪd/ | acide |
| muscle nom | /ˈmʌs.əl/ | muscle |
| gene nom | /d͡ʒiːn/ | gène |
| ion nom | /ˈaɪ.ɑn/ | ion |
| immune adjectif | /ɪˈmjuːn/ | immun |
| molecule nom | /ˈmɑ.lɪ.kjul/ | molécule |
| repair verbe | /ˈɹiːpɛɚ/ | réparer |
| lung nom | /ˈlʌŋ/ | poumon |
| machinery nom | /məˈʃiːnəɹi/ | machines, parc de machines |
| enzyme nom | /ˈɛn.zaɪm/ | enzyme |
| complicated adjectif | /ˈkɑm.plɪˌkeɪ.tɪd/ | compliqué, alambiqué |
| survival nom | /sɚˈvaɪ.vəl/ | survie |
Les verbes à particule que vous entendrez
| Mot | Prononciation | Sens |
|---|---|---|
| break down verbe | tomber en panne | |
| lock up verbe | /ˌlɒk ˈʌp/ | enfermer |
| run out verbe | épuiser, être à court | |
| shut down verbe | éteindre | |
| fight back verbe | /faɪt bæk/ | contre-attaquer |
| fill up verbe | remplir | |
| slow down verbe | ralentir, décélérer | |
| speed up verbe | /spiːdˈʌp/ | accélérer |
Des phrases à répéter
Des phrases courtes et complètes de la vidéo, à réutiliser dans la conversation de tous les jours :
- If your lungs fail, oxygen can’t be harvested.
- If your heart fails, it can’t be distributed.
- “Did I make the most of my life?
- Are you experiencing anything in this phase?
- Will you go on to exist in some other way?
La grammaire de cette vidéo
Les structures que le locuteur utilise le plus, avec les mots exacts de la vidéo :
| Structure | Dans la vidéo |
|---|---|
| Voix passive be + participe passé — l’accent est mis sur ce qui arrive, pas sur qui le fait | is built · are exclusively devoted · can't be harvested |
| Present perfect have/has + participe passé — une action passée qui compte encore maintenant | has reached · you've stopped · have shriveled |
Prononciation à surveiller
Le locuteur utilise 7 contractions et formes réduites, comme can't, don't, they're. Prononcez-les sous leur forme courte, telles que vous les entendez.
- Les sons « th »: breathe /bɹiːð/, thrive /θɹajv/
- Les sons « sh » et « zh »: machinery /məˈʃiːnəɹi/, tissue /ˈtɪʃ.(j)u/, rush /ɹʌʃ/, transition /tɹænˈzɪʃ.ən/, efficient /ɪˈfɪʃənt/
- Mots longs — placez bien l’accent: electrical /ɪˈlɛktɹɪkəl/, machinery /məˈʃiːnəɹi/, complicated /ˈkɑm.plɪˌkeɪ.tɪd/, electricity /ɪˌlɛkˈtɹɪsɪti/, generator /ˈdʒɛnəɹeɪtə(ɹ)/
Les sons difficiles pour les francophones :
- /h/ — il se souffle, il n’est pas muet: hungry /ˈhʌŋ.ɡɹi/, wherever /(h)wɛɹˈɛvɚ/, hostile /ˈhɑstəl/, headline /ˈhɛd.laɪn/
- /tʃ/ et /dʒ/ — à ne pas adoucir en « ch » et « j »: oxygen /ˈɑksɪd͡ʒən/, gene /d͡ʒiːn/, generator /ˈdʒɛnəɹeɪtə(ɹ)/, biological /ˌbaɪ.əˈlɑ.d͡ʒɪ.kəl/, cage /keɪd͡ʒ/
- /r/ anglais — langue recourbée, sans frotter la gorge: electrical /ɪˈlɛktɹɪkəl/, membrane /ˈmɛm.bɹeɪn/, repair /ˈɹiːpɛɚ/, machinery /məˈʃiːnəɹi/, electricity /ɪˌlɛkˈtɹɪsɪti/
Comment s’entraîner avec cette vidéo
- Écoutez la vidéo en entier une fois sans parler et notez les mots que vous ne connaissez pas.
- Commencez à la vitesse 0,75×, répétez phrase par phrase, puis revenez à la vitesse normale quand cela devient facile.
- Enregistrez-vous et comparez avec l’original, en faisant attention à des mots comme oxygen, organ, membrane.
Qu'est-ce que la technique du Shadowing ?
Le Shadowing est une technique d'apprentissage des langues fondée sur la science, développée à l'origine pour la formation des interprètes professionnels. Le principe est simple mais puissant : vous écoutez de l'anglais natif et le répétez immédiatement à voix haute — comme une ombre suivant le locuteur avec un décalage de 1 à 2 secondes. Les recherches montrent une amélioration significative de la précision de la prononciation, de l'intonation, du rythme, des liaisons, de la compréhension orale et de la fluidité.