何时使用BE【am/is/are/was/were/has（have）been】?

何时使用BE【am/is/are/was/were/has（have）been】? 六年级英语Be的形式使用Be的形式可分为am is are was were你能说出如何使用吗?一般疑问句_____________________________否定句_____________________________ 英语中is,are,am何时用 be 是 is am are 怎样区分疑问句中使用am is are was were还是do does did呢? is,am,are,was,were,being,been,to be怎么用 be.am.is.are.were.was.been.being.分别是什么时候用的 are is were was am 分别是什么主语的be动词 is are were am was 分别是什么主语的be动词 什么情况下be是不用变成am is are was were 的 在句子中什么时候用be,什么时候用am,is,are,was,were?be这个词什么时候出现在句子里？ 什么时候用be动词的原形我指的不是am,is,are,was,were哦,是be哦. am is are什么时候用原形be be动词有那些is,am,are 什么时候用be is are am am is are是be动词吗? 什么时候用be,而不是am,is,are 就是be,is,am.are的区别