内容正文:
ACTION
创新微课
现在开始
have to与must 的用法及区别
创新微课
have to与must的用法及区别
一、must 用法(一)
表示义务、命令或必要,后面接不带to的动词不定式。
Soldiers must obey orders.
创新微课
have to与must的用法及区别
must 用在否定句结构中表示“不允许、禁止”。
You mustn’t smoke in the office.
一、must 用在否定句结构用法(二)
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have to与must的用法及区别
一、must用在一般疑问句中用法(三)
must用在一般疑问句中,
肯定回答用must;
否定回答用needn’t 或don’t have to。
—— Must I hand it in before five?
—— No, you _________________________.
—— Yes, you ______________.
you needn’t. / don’t have to
you must
创新微课
have to与must的用法及区别
二、have to 用法特点
1. have to 由have + to组成,表示不得不。
例句: He is an invalid and has to have a nurse.
She knew what she had to do.
I shall have to reconsider my position.
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have to与must的用法及区别
三、have to 与must区别
1.含义不同
must 表示说话人的主观思想,强调个人意志和主观的决心。
have to侧重于客观上的必要,强调客观条件作用的结果。
例句:You must do it now.
例句:I have to go now.
创新微课
have to与must的用法及区别
三、have to 与must区别
2. 适用时态不同
must 只能用于一般现在时和一般过去时,(在间接引语中)
ha