am is are be been

来源：百度知道 编辑：UC知道 时间：2024/05/09 03:31:27
我读被这些词弄糊涂了我知道的关系是
am is are 是BE动词
been是be的过去式
am is are 应该都有过去式吧? are的过去式是were. 那用be的句子在过去式就用been?那什么情况用be? 什么情况用are am is?
有了am is are 为什么要有BE呢 COPY者不用COPY ,我一定不给最佳答复!

1. am is are 的区别
am只用在I 后面, 如 I am a girl 我是女孩
第三人称单数后面跟 is 如 He/She/It/Jim/is
其他跟 are, 如 They/we/girls/boys are

2. 什么情况下用Be？
借助外加助动词如do,did.或者在情态动词如can,will,would,could,should,may,might之后都必须使用be, 而不能直接用am is are. 例如，要说He can be a teacher. 而不能说 He can is a teacher. 同样的，He is a teacher 是正确的说法，He be a teacher 就是错误的说法了。

在完成时要用be动词就要用been
Example:
I have been here since last summer.
I have been interested in it for a long time.
在有情态动词的情况下还要用be动词是就要用到be
Example:
I would be here waiting for you.
He may be interested in it.
is am are 就是一般时态用的

某些特定语境下 要用Be
其实主要看口语
多看看外国片
很有长进哦