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句型變換·肯定句變成否定句

1. 若原句中有動(dòng)詞be

原句中含有be動(dòng)詞(am, is, are, was, were) 和助動(dòng)詞(have, has, had) 和情態(tài)動(dòng)詞(can, shall, will, may, should, would, might, had better等)時(shí)，要在動(dòng)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)

2. 若原句中沒有動(dòng)詞be

原句中沒有be動(dòng)詞，助動(dòng)詞或情態(tài)動(dòng)詞時(shí)，要在行為動(dòng)詞前加助動(dòng)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(shí)義動(dòng)詞還是助動(dòng)詞。如：

The old man hurt his leg last Wednesday. 

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

3. 若原句中有不定代詞

原句中含有every, everything, all, both等不定代詞或both…and…, a lot of 等短語時(shí)，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(shí)，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)

4. 若原句為復(fù)合句

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(dòng)詞是think時(shí)，如果要否定后面的賓語從句，習(xí)慣上否定主句的謂語動(dòng)詞。如：

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

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