I
will call you as soon as possible.
Who will do the job ?
He would not let me try .
The door won't open. 3) Shall I (we)…? 可用于征求意见等,Will you…?可用于表示请求或邀请等。如: Shall I turn on the light?
5.need和dare的用法 need和dare可用作实义动词和情态动词, 用作实义动词时,后接动词要用不定式,有人称和数的变化,可用于肯定句、否定句和疑问句; 用作情态动词时,主要用于否定句和疑问句中,没有人称和数的变化,后接动词要用动词原形。如: You need not pay—it is free. We need to have lots of patience. Need I come? Yes , you must./No,you
needn’t. You needn't telephone him now. She dare not go out alone at night.
注意:need 表示“需要”,其后可接动名词,且要用主动形式表示被动意义。 如:The room needs cleaning. 二、情态动词的完成式和进行式 modal verb+ have done:
对过去发生的事情进行评价、猜测,表示“应当已经、想必已经、本 来可以做但未做” I should have finished the work earlier. He isn't here. He must have missed the train. Where can (could) he have gone? You could(might) have been more careful. You ought to have come,but why didn't you? modal verb+be doing:
对正在发生的事情进行评价、猜测,表示“想必正在、可能正在、应 当正在” It's 12 o'clock .They must be having lunch. They may be discussing the problem. He can't be telling the truth. She shouldn't be working like that.She is still so weak.
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