be 动词用法
1. be 动词 am is are
I 用am, you用are, he/she/is用is
复数用are, 三单用is
2.缩写: I am=I'm you are=you're they are=they're
he is =he's she is =she's it is =it's
3.Thanks=Thank you
1. be 动词 am is are
I 用am, you用are, he/she/is用is
复数用are, 三单用is
2.缩写: I am=I'm you are=you're they are=they're
he is =he's she is =she's it is =it's
3.Thanks=Thank you