不定式
动词不定式是非谓语动词的重要组成部分,在六级考试中非谓语动词部分是一个重点。常跟不定式的动词有 agree, fail , promise , afford , ask , happen , resolve , attempt . hesitate, seek, long , threaten , claim , manage , trouble ,consent, neglect, try , decide , offer , undertake , demand , plan . volunteer , determine , prepare , want , pretend , wish , endeavor , proceed , struggle 等,在了解了加 to 的单词之后,我们来看一看在什么情况下单词 to 可以被省略。
l 、在一般助动词或者情态动词之后 to 可以被省略。
2 、在动词 make , let , watch , see 之后作宾语的时候, to 可以被省略。
3 、在 why 和 why not 之后 to 可以被省略,如: Why spend such a lot of time? 为什么花这么多时问 ? 和 Why not go right now? 为什么 不 现在去呢 ?
4 、在 had better , had best , would rather , had sooner, cannot but , do nothing but 等结构后面 to 可以被省略。
下面 看一道 有关不定式的例题:
We sometimes imagine a desert island _______a sort of paradise , where the sun always shines .
A . to have B . to be C . having D . being
整个句子的意思是,我们有时候把荒岛想象成天堂,那里终日阳光普照。 imagine 后面常跟 to be+ 形容词 结构,根据这个知识点,正确答案为 B 。
可以跟这种结构的动词还有 think , consider , believe , find , feel , know , declare , guess , prove , suppose 等。这个结构中的 to be 常可以省略,如: They found him guilty .他们发现他有罪。
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