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. (烏魯木齊市中考題)
His mother ________ called the police for help ________. (答案：hasn’t, yet)
2. 若原句中沒(méi)有動(dòng)詞be
原句中沒(méi)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. (西寧市中考題)
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(yǔ)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. (新疆中考題)
________ Joy ________ Sam likes singing Beijing Opera.(答案：Neither, nor)
4. 若原句為復(fù)合句
在含有賓語(yǔ)從句的主從復(fù)合句中，當(dāng)主句的主語(yǔ)是第一人稱，謂語(yǔ)動(dòng)詞是think時(shí)，如果要否定后面的賓語(yǔ)從句，習(xí)慣上否定主句的謂語(yǔ)動(dòng)詞。如
I think she will come here soon. →I don’t think she will come here soon.
