问题描述： be动词有那些is,am,are 1个回答 分类：英语 2014-11-06 问题解答： 我来补答 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,you were,they were （过去时否定缩略式 wasn't,weren't）,过去分词 been,现在分词 being. 展开全文阅读
