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肯定句變否定句的技巧

一、動詞后直接加not。原句中含有be動詞(am, is, are, was, were) 和助動詞(have, has, had) 和情態(tài)動詞(can, shall, will, may, should, would, might, had better等)時,要在動詞后直接加not。如:

His mother has already called the police for help. 

His mother ______ called the police for help ______. (答案:hasn’t, yet)

二、原句中沒有be動詞,助動詞或情態(tài)動詞時,要在行為動詞前加助動詞(do, does, did)與否定副詞not的縮寫形式。另外,還需要將原句子中的some改為any; too改either;already改為yet。還需要分清do, have等是實義動詞還是助動詞。如(from zkenglish.com):

The old man hurt his leg last Wednesday. 

The old man ______ ______ his leg last Wednesday. (答案:didn’t hurt)

三、原句中含有every, everything, all, both等不定代詞或both…and…, a lot of 等短語時,與否定副詞not連用屬部分否定。把這些不定代詞變成neither, none, no one或把both…and…變成neither…nor…時,才是全部否定。如:

Both Joy and Sam like singing Beijing Opera. 

______ Joy ______ Sam likes singing Beijing Opera.(答案:Neither, nor)

四、在含有賓語從句的主從復合句中,當主句的主語是第一人稱,謂語動詞是think時,如果要否定后面的賓語從句,習慣上否定主句的謂語動詞。如:

I think she will come here soon. →I don’t think she will come here soon.

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