be.am.is.are.were.was.been.being.分别是什么时候用的
be.am.is.are.were.was.been.being.分别是什么时候用的
is,am,are,was,were,being,been,to be怎么用
am\are\is was\were been 分别是什么时态?
am,is,are,be,been,was,were的区别
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
英语造句请用is\am\are+p.p was\were+p.p is\am\are+being+p.pwas\were
填写适当的动词be(am, is, are, was, were)
何时使用BE【am/is/are/was/were/has(have)been】?
英语:Be本身的用法怎么说呢?反正要详细就可以了.是BE本身!除了am is are been being was we
用be动词(am,is are ,was,were)的正确形式填空
用be 的正确形式填空并翻译( am is are was were)