3E三笔备考第五讲动词
动词分类:1)实意动词2)情态动词3)连系动词4)助动词
时态:过去进行时
现在完成时:常与already/just/yet/ever/never/before等
for+时间段,since+某一时间
过去完成时:had+过去分词 表示过去的过去,时间标志词有by ,when, before, after
have been to 与have gone to 的区别
have been to 表示曾经去过某地,有过某种经历
have gone to 表示去某地了,现在还在那个地方或在去那的路上
语态:主动语态
被动语态
一般现在时am/is/are +过去分词
一般过去式was/were +过去分词
一般将来时will/shall/be going to +过去分词
含情态动词的被动语态:can/could/may/might/must/should +be +过去分词
常用被动语态句式:It is believed that.../It is reported that.../It is said that.../