be动词的一般现在时,一般过去时,一般将来时的句子结构和例句？

一般现在时be：is am are
例句：This is a book.(主系表结构)
又如：Are you at work？(主系表)
一般过去时be：was were
例句：I was at home last night.
又如 : They weren't happy…
一般将来时be: will be
例句 :She will be glad to see you here.
又如: we won't be free unless the work is completed.
具体句式变化都有规律可循,希望能帮到你。

参考答案：be 为连系动词、系动词 ，表示状态，不能跟动词原形，一般式为am/is/are ,过去式为was/were ，一般将来时am/is/are+going to +动词原形 。例如：I am a bus driver . I was ten years old last year. He is a worker .She was ill last week . We are students. They were at home llast night . I am going to go home tomorrow . Alice is going to play football next sunday morning . They are going to do some shopping soon .