满意回答
2019/10/06 03:43
请记着 : is只是 be的形式一种。原来 be有七种形式 forms，viz. am, is, are, was, were, been and being。所以, It is believed that the criminal has escaped.It 是主语is believed 是现在被动语态that the criminal has escaped 是从句子has escaped 是现在完成时态
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其他回答(2)
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其他用 is ：It is believed that the criminal has escaped.（据信罪犯已经逃跑了。）回答于 2019/10/06 04:24
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其他此处用 is。因为主语已经明确是 It，第三人称单数，对应的be动词应该用 is。It is believed that the criminal has escaped. （正解）回答于 2019/10/06 04:14
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