A 不定式结构用在acknowledge,assume,believe,claim,consider,estimate,feel,find,know,presume,report,say,think,under- stand等动词之后。
People consider/know/think等that he is这类句子有两种被动形式:
It is considered/known/thought etc.that he is
He is considered/known/thought etc.to be
同样:
People said that he was jealous of her.
人们说他妒忌她。相当于:
It was said that he was
He was said to be jealous of her.
据说他妒忌她。
在这两种结构中,用不定式的后一结构比较简洁。它主要用于be,尽管有时其他动词的不定式也可以这样用:
He is thought to have information which will be useful to the police.
人们认为他掌握了对警察有用的情况。
如句中所想到的内容涉及到以前的动作,则使用不定式的完成式,因此:
People believed that he was相当于:
It was believed that he was/He was believed to have been
People know that he was相当于:
It is known that he was/He is known to have been
这种结构可与任何动词的不定式的完成式连用。
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2016-02-29
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