概要：① The film should be very good as it is starring first-class actors. 这部新电影是一流演员主演的,估计拍得很好。 ② They should be home by now. 照说他们现在应当已经到家了。 3)(表示不确定)万一。例如: ① If I should see him, I'll tell him. 万一我见到他,我就告诉他。 ② If it should rain tomorrow, the sports meeting would be postponed. 万一明天下雨,比赛就延期举行。" 6. would 1) 表意愿。例如:: ① They would not let him in because he was poorly dressed. 他们不让他进去因为他衣着破旧。 ② I said I would do anything for you. 我说过我愿意为你做任何事。 2) 表委婉地提出请求、建议或看法。例如: ① Would you mind cleaning the window? 请把窗户擦一下好吗? ② They wouldn’t have anything against it. 他们不会有什么反对意见。 3) 表过去反复发生的动作或过去的一种倾向。例如:: Every time she was in trouble, she woul

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    ② The door won’t open.  这门打不开。
    5. should
    1) 表义务。意为“应该”(某件事宜于做),用于各种人称。例如:
    ① You should be polite to your teachers.   你对老师应该有礼貌。
    ② You shouldn’t waste any time.   你不应该浪费时间。
    2) 表推测,意为“想必一定、照说应该、估计”等。例如:
    ① The film should be very good as it is starring first-class actors.  这部新电影是一流演员主演的,估计拍得很好。
    ② They should be home by now.   照说他们现在应当已经到家了。
    3)(表示不确定)万一。例如:
    ① If I should see him, I'll tell him. 万一我见到他,我就告诉他。
    ② If it should rain tomorrow, the sports meeting would be postponed. 万一明天下雨,比赛就延期举行。"
    6.  would
    1) 表意愿。例如::
    ① They would not let him in because he was poorly dressed. 他们不让他进去因为他衣着破旧。
    ② I said I would do anything for you.   我说过我愿意为你做任何事。
    2) 表委婉地提出请求、建议或看法。例如:
    ① Would you mind cleaning the window?   请把窗户擦一下好吗?
    ② They wouldn’t have anything against it.   他们不会有什么反对意见。
    3) 表过去反复发生的动作或过去的一种倾向。例如::
    Every time she was in trouble, she would go to him for help.   她每遇到麻烦都会向她求助。他告诉我盒子打不开了。
    7.ought to
    1) 表义务,意为“应该”(因责任、义务等该做),口气比should稍重。例如:
    ① You are his father. You ought to take care of him.你是他父亲,应当管他。
    ② You oughtn’t to smoke so much.   你不应该抽这么多烟。
    2) 表推测,暗含很大的可能,语气较弱。例如:
    ① Han Mei ought to know his telephone number. 韩梅该知道他的电话号码。
    ② There’s a fine sunset; it ought to be a fine day tomorrow.  今天有晚霞,明天应该是个好天。
    8. used to
    表示过去的习惯动作或状态,现在不复发生或存在。疑问式和否定式有两种。例如:i
    ① There used to be a building at the street corner, but it has been pulled down.   街道拐角处过去有座楼房,现在拆了。
    ② I usedn’t (didn’t use) to smoke.   我过去不抽烟。j }F
    ③ Used you (Did you use) to go to school on foot? 你过去常步行去学校吗?
    9.特殊情态动词need和dare的用法:
    need和dare既可用作情态动词,也可用作实义动词。用作情态动词时,主要用于否定句和疑问句。用作实义动词时,可用于各种句式。
    1) 用作情态动词。例如:|
    ① You needn’t telephone him now.   你现在不必打电话给他。
    ② I don’t think you need worry.   我想你不必发愁。
    ③ She dare not go out alone at night.   她晚上不敢一个人出去。
    ④ How dare you say I’m unfair?   你竟敢说我不公平?_
    2) 用作实义动词。例如:
    ① You don’t need to do it yourself.   你不必亲自做这件事。
    ② We need to tell them the news.   我们需要把这消息告诉他们。
    ③ The table needs painting (to be painted.).   桌子需要油漆一下。
    ④ We should dare to give our own opinion.   我们要敢于提出自己的观点。
    ⑤ He did not dare (to) look up.   他不敢抬头看。
    ⑥ I dare say he’ll come again.   我想他会再来的。
    【注意】(I dare say…为固定习语)
    ◆ 难点突破
    1. 情态动词后跟完成式和进行式的用法
    1) 情态动词+动词完成式
    情态动词+动词完成式即“情态动词+ have + done分词”,表示对过去行为或动作进行推测、评论或判断。
    must have done 表示对过去某事的肯定猜测。其否定或疑问形式都用can(could) 来表示。  例如: 
    ① Since the road is wet, it must have rained last night.
    ② He can’t have missed the way. I drew him a map.
    ③ The dictionary has disappeared. Who could have taken it?
    当然对现在发生或将来发生的事情,要用must do 表示猜测, 否定为can’t do。例如:
    ④ He must understand that we mean business.
    ⑤ You must be hungry after a long walk.
    may / might have done表示推测过去某事“也许”发生了.may 比 might 表示的可能性在说话人看来稍大些。例如:

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