be動詞＋able＋to不定詞で書き換え可能。
- He can swim like a fish.
- I can’t eat soba because of my allergy.
- Can you hear me?
［許可］
- You can use the phone if you want to.
- You can't go to the park. It will still be wet from the rain last night.
- You can count on me. （count = rely, depend, trust）
［推量・可能性］
- Smoking can cause cancer.
- It can be very cold here in winter.
- I know you can win the competition.
［依頼］
許可は疑問文で使われると依頼になる。
- Can you open the window?
- Can I ask a question, please?
［提案・申し出］
可能が派生して申し出となることがある。
- You don't need to walk home. I can take you there if you like.
- Can I help you?
→ 課題 #03
→ 文法 #34 助動詞の一覧
→ 文法 #40 助動詞 could
