人教版高中英語必修三unit 1《festivals around the world》（period 2）課件-文庫吧
2024-10-28 05:02 本頁面
【正文】 country… looks as though it might be covered with pink snow. 1. ability, ability, permission, possibility, request 2. permission or request, possibility 3. promise or prediction, past habit, request 4. promise, advice, prediction 5. advice or necessity, guessing, guessing Modal Verb Presentation 情態(tài)動詞 情態(tài)動詞有一定的意義，但沒有人稱和數(shù)的變化，不能獨立使用，它和后面的動詞構成謂語． 除 ought 和 have 外，后面只能接不帶 to 的不定式。 只作情態(tài)動詞的 can / could, may / might, ought to, must 可情態(tài)可實義的 need, dare 可情態(tài)可助動詞的 shall / should, will / would 相當于情態(tài)動詞的 have to, used to 情態(tài)動詞 含義 否定式 注意點 can / could 表能力 “能，會” can’t “不會，不能” 區(qū)別 be able to 表許可 “可以” can’t “不可以，不許” 代替 may 表推測 “可能” can’t “不可能” 主要用于 否定、疑問句 中 1表示某人通過努力克服困難做成某事，要用 was / were able to。 2 could, might, would 表委婉語氣用于疑問句，答語仍須用 can, may, will。 3 can 用于肯定句中 , 可表示“ 有時可能 ” Everyone here can speak English. —Could I have a look at your notebook? —Yes, you can. / No, you can39。t. It can’t be Mary. She has fallen ill. Can this news be true? Where can they be? She can’t have left school, for her bike is still here. The monkeys look sweet, but they can be very naughty. She can / is able to sing the song in English. I could read when I was four. The fire spread through the hotel quickly but everyone was able to get out. 情態(tài)動詞 含義 否定式 注 意 點 may / might 表許可 “可以” mustn’t “不許，嚴禁” 口語中也可用 can’t 表推測“可能” can’t “不可能” 主要 用于 肯定 句， 不 能用在 疑問 句 （ may not 可能不） —May I use your pencil? —Yes, you may. / No, you mustn’t. She may not be working now. John
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