肯定句變否定句的技巧

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. (烏魯木齊市中考題)

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

The old man hurt his leg last Wednesday. (西寧市中考題)

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. (新疆中考題)

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

四、在含有賓語從句的主從復(fù)合句中，當(dāng)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(xí)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.