am用于第一人称单数,如i am a student;is用于第三人称单数,如He is a studentare用于第一,三人称复数或第二人称单数,如we are students; they are students;were用于第一,三人称复数过去式,如we were students或they were students.was用于第一,三人称单数过去式,如I was a student; He was a student....
买本语法书是必要的，有本叫grammar is so easy 把语法简单化 例子很好很明显你一看就懂 我是0基础的也能看的懂 ,他专门有介绍Be 动词的,关于你写的am is are这个是用语 你我他 后面 翻译就是 "是"的意思 I am 我是 you are 你是 he is 他是 she is 她是 it is 它是,类推, were was 是ar...
am只用在I后面 I amis在第三人称单数后面he is; she is; Tom is; The table isare用在复数及第二人称单数后面 you are; we are; they are; Tom and Mary are; the tables arewere was用在过去式were是are的过去式，was是am 和 is 的...
