三、which和as which和as都可引导非限制性定语从句,用来指代整个主句的内容, which 引导的从句只能放在主句后,as 引导的从句放在主句前后均可;which 意为“这一点”,as 意为“正如”。as还可用于the same …… as, such …… as等结构中,引导限制性定语从句。
如:He turned out to be a great success as a dancer, which was more than we could expect. As is known to all, Madame Curie is the first woman scientist in the world to have won two Nobel Prizes. Have you bought the same dictionary as I referred to yesterday?
四、非地点名词作先行词时用where 引导定语从句的特例通常先行词是地点名词,且定语从句的引导词在从句中作地点状语时,用where 引导定语从句,但有时先行词是非地点名词时,也须用where 引导定语从句,表示抽象意义的一种状态,此类词包括point, situation, case 等。
如:The treatment will continue till the patient reach the point where he can walk correctly and safely. (point意为“程度”)
Can you think of a situation where this idiom can be used? (situation意为“情景”)
There‘re always cases where non?鄄native English speakers can’t make themselves understood just because of their lack of culture background of the visited countries.(case意为“情形,情况”)
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