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助動詞、can と could 演習 英語で
助動詞「can」と「could」は、英語の基本的な文法項目であり、さまざまな状況で使われます。「can」は、現在形で能力や可能性を表す際に使われ、「could」は、その過去形や丁寧な依頼、仮定の状況での可能性を示す際に使われます。この二つの助動詞の使い方をしっかり理解することで、英語でのコミュニケーションがより自然で効果的になります。
このページでは、「can」と「could」の具体的な使い方を例文とともに詳しく説明し、練習問題を通じて理解を深めることができます。基本的な文法ルールから実際の会話での応用まで、幅広く学ぶことで、自信を持って英語を使いこなせるようになることを目指します。さあ、さっそく学習を始めてみましょう！
Exercise 1
<p>1. She *can* play the piano very well (能力を表す言葉).</p>
<p>2. When he was young, he *could* run very fast (過去の能力を表す言葉).</p>
<p>3. *Can* you help me with my homework? (依頼を表す言葉).</p>
<p>4. We *could* go to the beach if it stops raining (可能性を表す言葉).</p>
<p>5. *Can* you speak any other languages? (能力を表す言葉).</p>
<p>6. When I was a child, I *could* climb trees easily (過去の能力を表す言葉).</p>
<p>7. If we hurry, we *can* catch the last train (現在の可能性を表す言葉).</p>
<p>8. *Could* you please pass the salt? (丁寧な依頼を表す言葉).</p>
<p>9. She *can* solve complex math problems quickly (能力を表す言葉).</p>
<p>10. When I was younger, I *could* stay up all night without getting tired (過去の能力を表す言葉).</p>
Exercise 2
<p>1. She *can* swim very well (ability in the present).</p>
<p>2. When I was young, I *could* run fast (ability in the past).</p>
<p>3. *Can* you help me with my homework? (asking for assistance).</p>
<p>4. If I had more time, I *could* learn another language (hypothetical ability).</p>
<p>5. We *can* see the mountains from our window (present ability).</p>
<p>6. He *could* play the piano when he was five (past ability).</p>
<p>7. *Can* you hear that noise? (ability to perceive sound).</p>
<p>8. She said she *could* come to the party (reported ability).</p>
<p>9. If you train hard, you *can* become a great athlete (future ability).</p>
<p>10. Last night, I *could* not sleep at all (past inability).</p>
Exercise 3
<p>1. She *can* swim very fast. (能力についての助動詞)</p>
<p>2. We *could* go to the beach if it stops raining. (条件付きの可能性についての助動詞)</p>
<p>3. *Can* you help me with my homework? (依頼するときの助動詞)</p>
<p>4. When I was younger, I *could* run a mile in under six minutes. (過去の能力についての助動詞)</p>
<p>5. If you practice every day, you *can* become a great musician. (未来の可能性についての助動詞)</p>
<p>6. Sorry, I *can't* come to the party tonight. (否定の助動詞)</p>
<p>7. *Could* you please pass me the salt? (丁寧な依頼の助動詞)</p>
<p>8. He said he *could* finish the project by tomorrow. (他人の能力についての助動詞)</p>
<p>9. *Can* I borrow your pen for a moment? (依頼の助動詞)</p>
<p>10. When I was a child, I *could* stay up late without getting tired. (過去の習慣についての助動詞)</p>
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