《【精品PPT】现在完成时的被动语态.ppt》由会员分享，可在线阅读，更多相关《【精品PPT】现在完成时的被动语态.ppt（41页珍藏版）》请在三一文库上搜索。
,外研版 初三 (上) Module 4,Unit 3 Language in use,Language practice,Paper and printing have been used for ages. The battery hasnt been changed for a couple of months. Has it been published yet?,现在完成时的被动语态: have/has (not) been +过去分词,Information can be kept on CD-ROMs. Books could only be produced one at a time. Can books be replaced by computers?,情态动词的被动语态: 情态动词(not)+ be +过去分词,当我们不知道谁是动作的执行者, 或者没有必要指出谁是动作的执行者时, 或者只需强调动作的承受者时, 要用被动语态。 被动语态:主语是动作的承受者 。,Conclusion (一),一般现在时 amis are +动词的过去分词 一般过去时 waswere +动词的过去分词 情态动词 aux.v. (mustcancouldmay + be +动词的过去分词,被动语态的构成：be +动词的过去分词,