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> 英语语法 > 初中英语语法讲解(文本加音频) >  第24课

初中语法讲解:情态动词(1)-2

所属教程:初中英语语法讲解(文本加音频)

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2017年03月08日

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[00:01.51]No,you don't have to.

[00:13.51]2 must表示推测,用于肯定句中They must be tiredafter the long trip.

[00:41.43]The lights is stillon in his room.He must be studyingnow.

[01:06.77]The classroom is soclean.The studentsmust have cleanedit yesterday.

[01:49.73]3 have to表示“必须,不得不”,可用于多种时态

[02:01.36]They have to leavenow.He has to walk toschool every day.

[02:12.94]You don't have tofinish the soup ifyou don't like it.

[02:42.58]She missed the bus,so she had to takea taxi.

[03:05.07]I'm sorry I won't goshopping with younext week. I'll haveto visit my teacher.

[03:34.07]4 have to和mustYou don't have totell him the news.

[03:56.63]You mustn't tell himthe news.

[04:21.50]must和have to的区别

[04:26.02]must表示说话人的主观人的主观看法,have to表示客观需要

[04:30.72]We must clean ourclassroom every day.(作为一种义务,无论干净与否,每天要扫)

[04:48.11]I have to leave now.It's getting late.(天黑了,不允许我再呆下去了)

[05:14.77]may和might

[05:22.32]1 may表示允许或征询对方许可You may go out andplay football.

[05:35.00]May/Might I watch TVafter I finish myhomework?

[05:56.72]May I smoke in theroom?__Yes,you may./__Yes,please.

[06:12.33]__No,you mustn't.__No,you can't.__No,you'd better not.

[06:33.42]2 may表示推测,多用于陈述句。might表示可能性更小

[06:46.34]The foreign friendsmay come tomorrow.It might snow thisevening.

[07:30.10]3 may用在感叹句中可以表示祝愿或愿望

[07:40.72]May you have a goodtrip.May you succeed.

[07:53.13]need和dare

[08:00.14]1 need作为情态动词主要用于否定句和疑问句中

[08:07.26]He needn't buy thatbook.

[08:27.30]Need he go at once?__Yes,he must.__No, he needn't

[09:03.88]2 dare作为情态动词主要用于否定和疑问句中How dare you saythat?

[09:23.00]She dare not ask herdad for money.

[09:39.15]3 need和dare也可以用作实意动词,其变化与一般动词相同。

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