概要： 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
2017届高三英语语法复习教案之情态动词,标签：高三英语复习教案,高三英语备课教案,http://www.67jx.com8. 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:
⑥ I can’t find my keys. I may / might have left them at the school yesterday.
could have done 在肯定句型中, 往往用作委婉的批评. 本应该做什么,而没做; 有时也用作猜测。例如:
⑦ You could have told us earlier.
⑧ Tom could have taken the dictionary.
ought to / should have done和 ought not to / shouldn’t have done用于对已发生的情况表示“责备”、“不满”,分别表示“本应该…”和“本不应该…”。例如:
⑨ With all the work finished, I should have gone to the party last night.
⑩ You ought not to have made fun of him. He is not the one you laugh at but learn from.
needn’t have done 表示过去做了某事,但没有做的必要, 意为“本没必要…”。例如:
⑾ You needn’t have waken me up; I don’t have to go to work today.
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