be动词是什么意思?什么用法?答:be动词的用法 be (be/is/are/am/was/were) [bi:] vi 现在时 I am, you are, he is, we are, you are, they are (缩略式 I'm, you're, he's, we're, you're, they're), (否定缩略式 I'm not, isn't, aren't), 过去时 I was, you were, he was, we were, ...
请问be动词的具体用法,比如就近一致原则,A AND B + be, A or B +...答:be作助动词用的形式如下:①am, is, are, was, were ②助动词+be:shall be, will be, can be, etc.③have/has/had + been(完成时)④am, is, …being(进行时)(1)表达进行时态 句型 be + V-ing…(进行时态)例:What are you reading?(你正在阅读什么?)I am reading a ...