2017年6月英语四级语法知识点：主动形式
2017-05-12 阅读 : 次
2017年6月英语四级语法知识点：主动形式
过去 现在 将来 过去将来
一般
did do will/shall do should/would do
进行
was/were doing am/is/are doing will/shall be doing
完成
had done have/has done will/shall have done should/would have done (用于虚拟语气)
完成进行
had been doing have/has been doing /
大学英语四、六级考试 --- 四级写作备考资料本文地址：http://www.cetclub.com/cet4beikaoziliao/cet4xiezuoziliao/2018-07-06/29980.html
