摘要： 动词:行为动词.be动词.情态动词. (1)行为动词 原形.+s/es.+ed.+ing.具体判断方法如下: (2)be动词 a.Am--was Is --was Are--were 口诀:我用am, 你用are, is用在他她它.所有复数全用are. b.肯定和否定句 I am (not) from London. He /She is(not) a teacher. My hair is(not) long. Her eyes are(not) small. c. 一般疑问句 Am I -? Yes, you are. No, you aren’t. Are you/they-? Yes,we/ they are. No,we/ they aren’t. Is the cat fat? Yes, it is. No, it isn’t. is.am.are为一类.一般用于一般现在时.现在进行时和一般将来时中. was和were为另一类.一般用于一般过去时. (3)情态动词 can.must.should.would.may.情态动词后动词总是用原形.

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