He has seen the film before.
He hasnt seen the film before.
He will write the book in two months.
He wont write the book in two months.
He does his homework in the evening.
He doesnt do his homework in the evening.
2. 用含否定意义的词(如never, nothing, nobody, none, neither, little, few等)。
(1)always/ever never, and or。如:
He was always late for school last term.
He was never late for school last term.
(2)toonoteither, alreadynotyet。如:
He goes to school by bike, too.
He doesnt go to school by bike, either.
(3)allnone, bothneither, bothand neithernor,此时,谓语动词仍用肯定形式,但当neither作主语,谓语动词用单数形式;neither nor连接两个主语时,谓语动词应和靠近它的主语保持一致。如:
He knows all of the workers here.
He knows none of the workers here.
Both of the twins are from England.
Neither of the twins is from England.
3. 当think, believe, suppose等动词后面跟宾语从句时,通常用否定主句的谓语动词来达到否定从句谓语动词的目的。如:
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