module7unit21lesson3communicationworkshopgrammar(已修改)
2024-12-19 12:29 本頁面
【正文】 GRAMMAR 情態(tài)動詞 【 歸納 】 一、 can 和 could ★表示能力。 can 表示現(xiàn)在的能力， could 表示過去具有某種能力。如： My brother can speak four foreign languages. Sophia could read when she was four years old. 注意： can 表示“能夠”時與 be able to 同義 。 can 只有過去式 could，而 be able to可用于多種時態(tài)。另外， could 表示某人過去有某種能力，而 was / were able to表示某人通過努力、克服困難做成某事，相當(dāng)于 managed。如： She will not be able to visit the hospital tomorrow. Mike was an excellent tennis player when he was young. He could beat anybody. The fire spread through the building very quickly, but fortunately everybody was able to escape. ★表示許可。 could 比 can 表示的說話語氣更委婉。如： You can have a piece of cake after you’ve eaten your vegetables! Could I have a drink of water, please? ★表示可能性。此時 could 不是 can 的過去式，它表示推測的可能性比 can 小。如： Can he still be alive after all this time? If you’re not careful, you could get into even worse trouble. 二、 may 和 might ★表示 許可或征求對方許可 。如： You may / might use my bicycle so long as you return it before
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