肯定句变否定句的技巧
英语课
一、动词后直接加not。原句中含有be动词(am, is, are, was, were) 和助动词(have, has, had) 和情态动词(can, shall 1, will, may, should, would, might, had better等)时,要在动词后直接加not。如:
His mother has already called the police for help. (乌鲁木齐市中考题)
His mother ______ called the police for help ______. (答案:hasn’t, yet)
二、原句中没有be动词,助动词或情态动词时,要在行为动词前加助动词(do, does, did)与否定副词not的缩写形式。另外,还需要将原句子中的some改为any; too改either;already改为yet。还需要分清do, have等是实义动词还是助动词。如(from zkenglish.com):
The old man hurt his leg last Wednesday. (西宁市中考题)
The old man ______ ______ his leg last Wednesday. (答案:didn’t hurt)
三、原句中含有every, everything, all, both等不定代词或both…and…, a lot of 等短语时,与否定副词not连用属部分否定。把这些不定代词变成neither, none, no one或把both…and…变成neither…nor…时,才是全部否定。如:
Both Joy 2 and Sam like singing Beijing Opera. (新疆中考题)
______ Joy ______ Sam likes singing Beijing Opera.(答案:Neither, nor)
四、在含有宾语从句的主从复合句中,当主句的主语是第一人称,谓语动词是think时,如果要否定后面的宾语从句,习惯上否定主句的谓语动词。如:
I think she will come here soon. →I don’t think she will come here soon.
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技巧