请教个最基础的英语语法

问题描述:

请教个最基础的英语语法
单词量已经不少了,不过语法几乎为0....
所以问下大家be动词怎么用呢?
像am is are were was
这几个分别怎么用?能给个例子吗?

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...