肯定句/否定句/疑问句之变形技巧―、肯定句改否定句1、be 动词后加 not,诸如:isnot(isn't),arenot(aren't),wasnot(wasn't),werenot(weren't),amnot(无缩写)o■ Heisastudent
他是一个学生
---Heisnotastudent
他不是一个学生
■ TheywerewatchingTVthen
那时他们正在看电视
---Theyweren'twatchingTVthen
那时他们没在看电视
2、情态动词等后加 not/诸如:cannot(can't),willnot(won't),shouldnot(shouldn't),mustnot(mustn't),need(needn't)等
■ Shecantakecareofherself
她能照顾好她自己
---Shecannot(can't)takecareofherself
她不能照顾好她自己
■ Youshouldgohome
---Youshouldn'tgohome
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
■ Shelikestheroom
她喜欢这房间
---Shedoesn'tliketheroom
她不喜欢这房间
■ Wedidourhomeworkyesterday
我们昨天做了作业
---Wedidn'tdoourhomeworkyesterday
我们昨天没有做作业
注:句中若有 some,须将其改成 any
■ Iwantsomebooks