Shadowing Practice: Why is sleep important? | But Why Bites - Learn English Speaking with Video
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Vocabulary and speaking notes for this lesson
This speaking lesson is built on the video “Why is sleep important?”. The speaker keeps coming back to these words: sleep, brain, sleeping, parts. This video has 24 sentences and 316 words to shadow. The speech runs for 1:52. The speaker talks at a natural 169 words per minute, close to everyday conversation. 90% of the words are among the 3,000 most common in English, so the vocabulary is easy to follow.
Key vocabulary in this video
13 words from the video worth learning, with pronunciation and meaning:
| Word | Pronunciation | Meaning |
|---|---|---|
| asleep adjective | /əˈsliːp/ | In a state of sleep; also, broadly, resting. |
| mathematics noun | /mæθ(.ə)ˈmæt.ɪks/ | An abstract representational system studying numbers, shapes, structures, quantitative change and relationships between them. |
| awake verb | /əˈweɪk/ | To become conscious after having slept. |
| mood noun | /muːd/ | A mental or emotional state, composure. |
| encounter verb | /ɪnˈkaʊntɚ/ | To meet (someone) or find (something), especially unexpectedly. |
| mentally adverb | /ˈmɛntəli/ | In a mental manner; an idea thought out in one's mind, as opposed to an idea spoken orally. |
| immune adjective | /ɪˈmjuːn/ | Exempt; not subject to. |
| teenager noun | /ˈtiːnˌeɪ̯d͡ʒə/ | A person between thirteen and nineteen years old (inclusive). |
| strengthen verb | /ˈstɹɛŋ(k)θən/ | To make strong or stronger; to add strength to; to increase the strength of; to fortify. |
| workout noun | /ˈwɝk.aʊ̯t/ | An exercise session; a period of physical exercise. |
| hormone noun | /ˈhoɹmoʊn/ | Any substance produced by one tissue and conveyed by the bloodstream to another to effect physiological activity. |
| vocabulary noun | /vəˈkæb.jə.lə.ɹi/ | A usually alphabetized and explained collection of words e.g. of a particular field, or prepared for a specific purpose, often for learning. |
| germ noun | /d͡ʒɝm/ | The embryo of a seed, especially of a seed used as a cereal or grain. See Wikipedia article on cereal germ. |
Phrasal verbs you will hear
| Word | Meaning |
|---|---|
| fight off verb | To succeed in defeating a challenge, or an attack. |
| find out verb | To discover, as by asking or investigating. |
| shut down verb | To close, terminate, or end; to stop operating, either permanently or temporarily. |
Grammar in this video
The structures the speaker uses most, with the exact words from the video:
| Structure | In the video |
|---|---|
| Possibility with “might / may” might/may + verb — something that is possible but not certain | may think · might have |
| Present continuous am/is/are + -ing — something happening right now or around now | you're sleeping · you're studying · are working |
| Future with “will” will + verb — a decision, promise or prediction | will have · will also help |
Pronunciation to watch
The speaker uses 12 contractions and reduced forms, such as you're, don't, can't. Say them the short way, as you hear them.
- The “th” sounds: mathematics /mæθ(.ə)ˈmæt.ɪks/, strengthen /ˈstɹɛŋ(k)θən/
- Long words — get the stress right: mathematics /mæθ(.ə)ˈmæt.ɪks/, vocabulary /vəˈkæb.jə.lə.ɹi/
How to practise with this video
- Listen to the whole video once without speaking and note the words you do not know.
- Start at 0.75× speed, shadow it sentence by sentence, then go back to normal speed once it feels easy.
- Record yourself and compare with the original, paying attention to words like asleep, mathematics, awake.
What is the Shadowing Technique?
Shadowing is a science-backed language learning technique originally developed for professional interpreter training and popularized by polyglot Dr. Alexander Arguelles. The method is simple but powerful: you listen to native English audio and immediately repeat it out loud — like a shadow following the speaker with just a 1–2 second delay. Unlike passive listening or grammar drills, shadowing forces your brain and mouth muscles to simultaneously process and reproduce real speech patterns. Research shows it significantly improves pronunciation accuracy, intonation, rhythm, connected speech, listening comprehension, and speaking fluency — making it one of the most effective methods for IELTS Speaking preparation and real-world English communication.