中考英语复习--肯定句否定句疑问句之变形技巧

中考英语复习--肯定句/否定句/疑问句之变形技巧 一、肯定句改否定句 1、be动词后加not，诸如：is not(isn't)， are not(aren't)， was not(wasn't)， were not(weren't)， am not（无缩写）。 ◆ He is a student. 他是一个学生。--- He is not a student. 他不是一个学生。 ◆ They were watching TV then. 那时他们正在看电视。--- They weren't watching TV then. 那时他们没在看电视。 2、情态动词等后加not，诸如：can not(can't)， will not(won't)，should not(shouldn't)，must not(mustn't)，need(needn't)等。 ◆ She can take care of herself. 她能照顾好她自己。--- She can not(can't) take care of herself. 她不能照顾好她自己。 ◆ You should go home. 你应该回家。--- You shouldn't go home. 你不应该回家。 3、若无法找到be动词或情态动词，就在已有动词前额外加助动词否定形式：don't/doesn't/didn't，同时将动词变原形。  ◆ She likes the room. 她喜欢这房间。--- She doesn't like the room. 她不喜欢这房间。 ◆ We did our homework yesterday. 我们昨天做了作业。--- We didn't do our homework yesterday. 我们昨天没有做作业。 注：句中若有some ，须将其改成any。 ◆ I want some books. 我想要一些书。--- I don't want any books. 我不想要任何书。 ◆ There is some water in the cup. 杯子里有一些水。--- There isn't any water in the cup. 杯子里没有水了。 二、肯定句改一般疑问句（三步法）  #1：把be动词（am/is/are...）或情态动词（can/wil