which在做非限定性定语从句引导词时有两个特点:
1 which前要有逗号与前面句子分开; 2 which引导非限定性定语从句指的是前面整句话的内容。
只要引导非限定性定语从句as和which都指一句话内容,区别在于which只能放在它所指那句话的后面,而as可以在前面也可以在后面。
38. You see the lightning _A_ it happens, but you hear the thunder later.
A the instant B for an instant C on the instant D in an instant
the instant=as soon as 一 就
39. The manager lost his _B_ just because his secretary was ten minutes late.
A mood B temper C mind D passion
lose one s temper 发脾气。
40. Great as Newton was, many of his ideas _C_ today and are being modified by the work of scientists of our time.
A are to challenge B may be challenged C have been challenged D are challenging
as表示 尽管 时引导从句,从句中的表语可以放在引导词之前构成部分倒装。
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