高中英语助动词分类及讲解
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助动词的分类 一、基本助动词 ：be, do, have
二、情态助动词： can/could, will/ would, may/might, shall/should, dare/dared, must, ought to, need, used to
三、半助动词 ：have to, seem to……
一、基本助动词 ：be, do, have
作为基本助动词，be, do, have本身没有实际意 思，只是在谓语中起语法作用或者说只表示语 法意义，帮助主动词（实义动词）构成否定、 疑问句式，或构成不同的时态和语态。
1. be动词通常用来协助主动词构成进行体或被动语态。 注意be动词的变形：am, is, are, was, were
How did he arrive here?
3. 助动词have通常用来协助主动词构成完成体或完成 进行体。 注意have的变形：has，had I have seen the film. She has seen the film. She had seen the film before you bought the ticket. I have been cheated. The cake has been sold. The cak源自文库 had been sold by the time you arrived. We have been working here for 10 years.
二、情态助动词 ：
情态助动词共有14个， 其中包括一些过去时 形式。他们是can/could, will/ would, may/might,
shall/should, dare/dared, must, ought to, need, used to。 注意：
1)情态助动词表示情态意义，其过去时形式并不 一定就是表示过去时间; 2)情态助动词不能重叠使用，其后必须加动词原 形一起构成复合谓语。
She didn't think you are very kind. Do you think you are very kind？ Did you think you are very kind？ Does she think you are very kind？ What do you think of the show?
She is often praised by her teacher. She was praised by her teacher. She will be praised by her teacher. They were praised by her teacher.
2. do 通常用来协助主动词表示否定意义或构成疑问句, 除此之外，do还可以用来加重语气。 注意do的变形：do, don't, does, doesn't, did, didn't
I am listening to music. I will be listening to music at 3:00 pm tomorrow. I was listening to music at 3:00 pm yesterday. They were listening to music at 3:00 pm yesterday.
I think you are very kind.
I do think you are very kind.
She does think you are very kind.
I don't think you are very kind.
She doesn't think you are very kind.
三、半助动词 ：
半助动词指某些兼有主动词和助动词特征的语 法结构，比如have to, seem to之类的结构既可以 直接在其后加上动词原形，也可以与其他助动 词搭配，像是主动词，而不完全像情态助动词。 半助动词后都必须加动词原形一起构成复合谓 语。
常见的半助动词： be to, be about to , be going to, be able to, be supposed to, be sure to, be certain to, be likely to, be willing to…… have to, have got to, had better, had best seem to, aeepear to, turn out to, tend to, happen to, get to……
二、情态助动词： can/could, will/ would, may/might, shall/should, dare/dared, must, ought to, need, used to
三、半助动词 ：have to, seem to……
一、基本助动词 ：be, do, have
作为基本助动词，be, do, have本身没有实际意 思，只是在谓语中起语法作用或者说只表示语 法意义，帮助主动词（实义动词）构成否定、 疑问句式，或构成不同的时态和语态。
1. be动词通常用来协助主动词构成进行体或被动语态。 注意be动词的变形：am, is, are, was, were
How did he arrive here?
3. 助动词have通常用来协助主动词构成完成体或完成 进行体。 注意have的变形：has，had I have seen the film. She has seen the film. She had seen the film before you bought the ticket. I have been cheated. The cake has been sold. The cak源自文库 had been sold by the time you arrived. We have been working here for 10 years.
二、情态助动词 ：
情态助动词共有14个， 其中包括一些过去时 形式。他们是can/could, will/ would, may/might,
shall/should, dare/dared, must, ought to, need, used to。 注意：
1)情态助动词表示情态意义，其过去时形式并不 一定就是表示过去时间; 2)情态助动词不能重叠使用，其后必须加动词原 形一起构成复合谓语。
She didn't think you are very kind. Do you think you are very kind？ Did you think you are very kind？ Does she think you are very kind？ What do you think of the show?
She is often praised by her teacher. She was praised by her teacher. She will be praised by her teacher. They were praised by her teacher.
2. do 通常用来协助主动词表示否定意义或构成疑问句, 除此之外，do还可以用来加重语气。 注意do的变形：do, don't, does, doesn't, did, didn't
I am listening to music. I will be listening to music at 3:00 pm tomorrow. I was listening to music at 3:00 pm yesterday. They were listening to music at 3:00 pm yesterday.
I think you are very kind.
I do think you are very kind.
She does think you are very kind.
I don't think you are very kind.
She doesn't think you are very kind.
三、半助动词 ：
半助动词指某些兼有主动词和助动词特征的语 法结构，比如have to, seem to之类的结构既可以 直接在其后加上动词原形，也可以与其他助动 词搭配，像是主动词，而不完全像情态助动词。 半助动词后都必须加动词原形一起构成复合谓 语。
常见的半助动词： be to, be about to , be going to, be able to, be supposed to, be sure to, be certain to, be likely to, be willing to…… have to, have got to, had better, had best seem to, aeepear to, turn out to, tend to, happen to, get to……