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如何巧學善用英語成語 
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句型變換·肯定句變成否定句
2010-07-28 04:27 • 作者:english 評論(0)
1. 若原句中有動詞be
原句中含有be動詞(am, is, are, was, were) 和助動詞(have, has, had) 和情態動詞(can, shall, will, may, should, would, might, had better等)時，要在動詞後直接加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. 若原句中沒有動詞be
原句中沒有be動詞，助動詞或情態動詞時，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)
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，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)
4. 若原句為複合句
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，如果要否定後面的賓語從句，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.
