第1个回答 2011-10-06
be 动词(am is are) 和助动词(do does)常有人搞不懂啊~~
用法当然很多, 这里也讲不完, 简单来说,
be动词後面常接名词, 形容词, 代词, 动名词(动词-ing), 或句子.
如: I am a student. (am 接student-->名词)
She is pretty. (is接pretty-->形容词)
It was him whom she saw in the classroom. [was(am, is的过去式)接him-->代词]
They are swimming. (are接swimming-->动词-ing)
do, does 常用来帮助一般动词完成否定句或问句,
如: He doesn't like flowers. (does not= doesn't 接一般动词 like)
Do you have 100 dollars? (do後接一般动词 have)
注意: I, you, we , they, 或两人以上的复数名词或代词, 搭配do构成句子.
he, she, his brother...等第三人称单数, 搭配does.