三、as,which引导的定语从句 1.as引导的定语从句 用在the same...as,such...as,as...as,so...as结构中,as可以作主语、宾语或表语,可以用来代替先行词。 They could only read such stories as had been rewritten in simple English.(as作主语) These houses are sold at such a low price as people expected.(as作宾语) He is not the same man as he was.(as作表语) 【悟一悟→参透误区】 (1)such...as...(定语从句)像……那样 such...that...(状语从句)如此……以至于…… This is such an easy question as I can answer.(定语从句) This is such an easy question that I can answer it.(状语从句) (2)the same...as...表示相似的东西 the same...that...表示同一人或物 This is the same knife as I lost. This is the same knife that I lost. 2.关系代词as,which的区别 (1)as引导的非限制性定语从句,既可在主句前,又可在主句后,有时还可插入主句中,而which引导的非限制性定语从句只能置于主句之后。 I borrowed the book Sherlock Holmes from the library last week,which my classmates recommended to me.(2017·北京高考) (2)当非限制性定语从句放在主句前面时,只能用as。 As is known to everybody,the moon travels round the earth once every month. = It is known to everybody that the moon travels round the earth once every month.(名词性从句) = What is known to everybody is that the moon travels round the earth once every month.(名词性从句) (3)as意为“正如……”,后面的谓语动词多是see,know,expect,say,mention,report,announce等; which意为“这一点”。 A war is so cruel that it always causes great losses,as has happened in Libya. Tom has made rapid progress,which makes me very happy.
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