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今年英语三级语法指导复习7_大学三级

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    一、基本区别
    look 指视觉印象,appear 指外表给人的印象,这两者可能是真象也可能是假象,appear的不确定性更大一些,seem 侧重指根据某种迹象作出的推断,也不一定是事实。
    二、后接不定式的问题
    三者均可后接不定式,但 look 之后一般只限于 to be(且较少见):
    he seems [appears, looks] to be very tired. 他好像很累了。
    he seems [appears] to have traveled a lot. 他似乎去过不少地方。
    this seems to be a happy solution. 这似乎是一个理想的解决办法。
    但是不说he looks to have traveled a lot.
    三、后接like的问题
    look, seem 之后可接介词 like,但 appear 之后一般不能:
    he just looks like his brother. 他的模样就像他的哥哥。
    he seems like a fool. 他看起来像个傻瓜。
    四、用于进行时态的问题
    appear 和seem不用于进行时态,但look有时可这样用(尽管较少见):
    he looks [is looking] well. 他看上去气色不错。
    但是不说he is seeming [appearing] well.
    五、用于it开头的句子
    三者均可用于 it 开头的句子,且三者之后均可接以 as if 或 as though 引导的从句,另外 appear 和 seem 之后还可接 that 引导的从句:
    it looks [seems, appears] as if he has lost interest in his job. 看来他对自己的工作已失去了兴趣。
    it seems [appears] that he is very tired. 他似乎很累了。
    为避免重复,appear和seem后接的 that 从句有时可用so, not 代之:
    “is he reliable? ” “it seems [appears] so (not).”“他可靠吗?”“似乎是可靠的(不可靠)。”


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