シャドーイング練習: Mindset For IELTS 1 track 68 - 動画で英語スピーキングを学ぶ
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34 文
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Track 68 Good morning, everyone.
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In today's lecture, I want to talk to you about a very unpopular animal here in Britain.
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In fact, you could say that it's one of our least loved animals.
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It's called the American bullfrog, and yes, it does in fact come from America, the east of America to be exact.
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And it was brought to Britain in the early 19th century, so you could say that it's been here for quite a long time.
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It wasn't brought here on purpose.
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It actually arrived in a big container of aquatic plants.
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In other words, it was accidentally introduced into Britain.
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Now, I'll tell you a little about its appearance.
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The American bullfrog is a very large and ugly species of frog.
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And when I say it's large, I mean large.
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Interestingly, female American bullfrogs are usually much larger than the males.
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In fact, they can weigh up to 750 grams, whereas the males only go up to about 600 grams.
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Take a look at its head.
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It's really broad and flat, isn't it?
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And you can see its mouth just here.
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That's quite large too.
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Now, both the male and the female American bullfrogs have green
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or brown bodies and have dark spots on the top but there's one important difference between them.
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The male's throat is yellow but the female has a white one instead.
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And the other difference is their eardrums, here just behind their eyes.
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Those of the male are much larger than the female's.
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So let's move on to why we so dislike the American bullfrog.
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Well, this is because it has threatened our own native species of frogs.
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Firstly, it breeds very quickly indeed.
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For example, female bullfrogs can lay up to 25 ,000 eggs every single season.
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And secondly, the American bullfrog is very greedy.
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In fact, they eat just about anything they can put into their mouths.
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As well as other frogs, they eat insects, fish, and have even been known to eat birds and snakes.
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So, in other words, they eat the food sources of our own native species.
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Thirdly, they carry a disease that is dangerous to other frogs.
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And finally, they don't just damage our natural world, they cause financial damage too.
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Around £100 ,000 has been spent monitoring the American bullfrog in the wild.
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So, as scientists, we can learn a lesson from this about the dangers of introducing any living species into a new environment.
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このレッスンの語彙とスピーキングのポイント
このスピーキングレッスンは、動画「Mindset For IELTS 1 track 68」を教材にしています。 繰り返し出てくる語は次のとおりです：bullfrog, frog, species, male, female。 この動画には、シャドーイング用の文が34文、単語が405語あります。 音声の長さは2:49です。 話す速さは1分あたり約144語で安定しており、シャドーイングしやすいペースです。 単語の85%は英語の頻出3,000語に含まれます。残りは練習の前に確認しておきましょう。
この動画の重要語彙
動画に出てくる覚えておきたい単語15語を、発音と意味つきで紹介します。
| 単語 | 発音 | 意味 |
|---|---|---|
| introduce 動詞 | /ˌɪntɹəˈdus/ | 紹介する, 引き合わせる |
| gram 名詞 | /ˈɡɹæm/ | グラム |
| lesson 名詞 | /ˈlɛs.ən/ | 授業, 学科 |
| egg 名詞 | /ɛɡ/ | 卵, 玉子 |
| ugly 形容詞 | /ˈʌɡli/ | 醜い, 見苦しい |
| arrive 動詞 | /əˈɹaɪv/ | 着く, 到着する |
| monitor 名詞 | /ˈmɑ.nɪ.tɚ/ | モニター |
| throat 名詞 | /ˈθɹoʊt/ | 喉 |
| snake 名詞 | /sneɪk/ | 蛇, ヘビ |
| accidentally 副詞 | /ˌæk.sɪˈdɛnt(ə)li/ | 無意識的に, 偶然 |
| scientist 名詞 | /ˈsaɪəntəst/ | 科学者 |
| lecture 名詞 | /ˈlɛk.t͡ʃə/ | 講義 |
| breed 動詞 | /ˈbɹiːd/ | 育てる, 育成する |
| container 名詞 | /kənˈteɪ.nəɹ/ | 容器 |
| weigh 動詞 | /weɪ/ | 重さを計る, 量る |
この動画の文法
話し手がよく使っている文型を、動画の実際の表現とともに紹介します。
| 文型 | 動画での表現 |
|---|---|
| 現在完了形 have/has + 過去分詞 — 過去の出来事が今も関係している | it's been · has threatened · have even been known |
| 受動態 be + 過去分詞 — 誰がするかより、何が起きるかに焦点を当てる | was brought · wasn't brought · been known |
注意したい発音
話し手はdon't, I'll, isn'tなど、短縮形や弱形を4回使っています。聞こえたとおりの短い形で発音しましょう。
- 「th」の音: throat /ˈθɹoʊt/, threaten /ˈθɹɛt.n̩/, thirdly /ˈθɚdli/
日本語話者が苦手な音：
- /r/ と /l/ の区別 — /l/ は舌先を歯茎につけ、/r/ はどこにもつけない: firstly /ˈfɜɹstli/, bullfrog /ˈbʊlfɹɑɡ/
- /f/ — 「フ」ではなく、上の歯と下唇で出す: firstly /ˈfɜɹstli/, bullfrog /ˈbʊlfɹɑɡ/
- 子音の連続 — 間に母音を入れない: introduce /ˌɪntɹəˈdus/, gram /ˈɡɹæm/, whereas /(h)wɛɹˈæz/, throat /ˈθɹoʊt/, snake /sneɪk/
この動画での練習方法
- まず声を出さずに動画を最後まで聞き、知らない単語をメモします。
- 通常の速度で一文ずつシャドーイングし、話し手のリズムに合うまで繰り返します。
- 自分の声を録音して元の音声と比べます。introduce, gram, lessonなどの単語に特に注意しましょう。
シャドーイングとは？英語上達に効果的な理由
シャドーイング（Shadowing）は、もともとプロの通訳者養成プログラムで開発された言語学習法で、多言語習得者として知られるDr. Alexander Arguelles によって広く普及されました。方法はシンプルですが非常に効果的：ネイティブスピーカーの英語を聞きながら、1〜2秒の遅延で声に出してすぐに繰り返す——まるで「影（shadow）」のように話者を追いかけます。文法ドリルや受動的なリスニングと異なり、シャドーイングは脳と口の筋肉が同時にリアルタイムで英語を処理・再現することを強制します。研究により、発音精度、抑揚、リズム、連音、リスニング力、そして会話の流暢さが大幅に向上することが確認されています。IELTSスピーキング対策や自然な英語コミュニケーションを目指す方に特におすすめです。