摘要:动词Be 叫连系动词, 连系动词be的用法:除了第一人称单数用am.和第三人称单数用is以外.其它人称用are. I am busy. You are busy. He (She) is busy. We are busy.

网址:http://m.1010jiajiao.com/timu3_id_3242758[举报]

查看习题详情和答案>>