is,am,are,was,were,being,been,to be怎么用

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 am,is,are,be,been,was,were的区别 英语造句请用is\am\are+p.p was\were+p.p is\am\are+being+p.pwas\were 何时使用BE【am/is/are/was/were/has（have）been】? am\are\is was\were been 分别是什么时态? 英文*是*怎么说的啊!到底是was.were,been 还是am,are,is啊? be able to的be可以换成is/was/am/were/are对吧 用“am/is/are/was/were"填空 用am is was are were造句 用am,is,are,was,were填空. 填写适当的动词be(am, is, are, was, were)