本文目录
如何辨别情态动词
和动词连用,表明说话者（或主语）情绪或态度的动词为助动词.常见的情态动词有：will would won't wouldn'tshall should shan't shouldn'tcan could can't couldn'tmay mightmust mustn'thave toused toought toneed ...
情态动词推测与虚拟如何区分
一,所有情态动词之后都只能跟动词原形；而行为动词则根据各自用法之后有跟原型,ing形式或不定式.
二,情态动词之后可以直接加上not表示否定,而行为动词只能利用助动词do,dose,did再加not来表否定.
三,行为动词有被动语态,情态动词无被动语态.
四,有些动词既可以作情态动词又可以作行为动词.如dare,need等.区别这类词是出于充当情态动词还是行为动词的状态参见上文一二两条原则.
实义动词和情态动词的区别
1. 时态不同, 实义动词基本可用语各种时态( 过去,现在,将来,完成)
情态动词一般用语一般过去,一般现在
如: I have to go now./ He is having lunch. He has a watch. He is going to have a meeting, tomorrow. He has alreas had a rest.
2. 实义动词可单独使用,有人称的变化, 情态动词后跟动词原形,没有人称和数的变化
如: He usually has lunch at home.
I/ We/ She/ He/ They can swim,
如何辨别情态动词和实义动词
和动词连用，表明说话者（或主语）情绪或态度的动词为助动词。
常见的情态动词有：
will would won't wouldn't
shall should shan't shouldn't
can could can't couldn't
may might
must mustn't
have to
used to
ought to
need needn't
dare daren't
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