2016年卫生类职称英语词汇：be

be动词的各种形态我们要认识：

1.be动词的现在时有三个：am, is, are

am的主语是I，组成I am/I'm

is的主语是单数第三人称，如：He is/She is/My mother is/Mary is

are的主语是复数，如They are/You and your brother are/Tom and Jerry are

2.be动词的过去式有2个：was, were

was的主语是I和第三人称单数，如I was/She was/It was

were的主语是复数，如You were/They were

3.be动词的过去分词为：been

如:I have been to...

4.be动词的原形就是be，一般放在将来时和其他要接动词原形的词后，如I will be there soon./ Try to be good,Jerry.