as的用法高考复习.pptVIP

as用法总结 定语从句状语从句 as用于定语从句 as可以用作关系代词，在限制性定语从句中，多同such或the same连用，构成such…as和the same …as结构，as的先行词可以是人或物，例如： He is not such a fool as he looks. We drove out of the town by the same road as we had entered by. 在非限制性定语从句中，关系代词as代替整个主句，这时as从句位置较灵活，可居于主句前面，中间或后面，通常要用逗号与主句隔开，译为“（正）像…一样”，as后如果是is或was+过去分词构成的被动语态，be动词可省去。例如： As might be expected, the response to the question was very mixed. Shelly, as all her friends agree, is unusually warm-hearted. As is known to all, we are all promising. As planned, they met on May 20.(也可说As was planned) 2002年真题55： We’ve just installed two air-conditioners in our apartment, ____ should make great differences in our life next summer. A, which B, what C, that D, they 这里which引导非限制性定语从句，which指代前面整个句子，但which引导非限制性定语从句只能放在主句之后。 As (is) reported, 150 people were killed in the aircrash. Which is reported, … As it is reported, … as is well known 众所周知 as often happens 这种情况经常发生 as is often the case 情况常常这样 as is supposed 如所预料 as has been pointed out 如所指出的 as用于状语从句 as 用于时间状语从句 as 用于时间状语从句时用法与while，when相当，when/while/as 引导的时间状从的谓语动词都具有延续性，例如： I broke a glass while I was cooking the dinner. The waiter spilt soup over me when he was serving/ served me. I read a newspaper while I was waiting/waited. I met Mary as I was going/ went home. 有时也可用when引导无延续性事件的分句。译为“这时”。 I was cooking the dinner when I broke a glass. I was going home, when I met Mary. as/so long as （只要）引导条件状语从句 I will go there so long as he invites me. 只要他邀请我，我就去。 as 引导原因状语从句 引导原因状语从句的有because, since, as等。 because通常表示“新信息”，即表示一种未知的原因，而since/ as 则表示已知原因，常译为“既然”。 As it is too late, you had better stay here. Since the town is far from here, you may go there by bus. Because he was ill, he was absent yesterday. as 引导比较状语从句 引导比较状语从句的从属连词有than, as…as, not as/so …as等。 She went to school earlier than Tom did. He got up as late as his brother (did). It is not so cold today as it was yesterday. 2002年真题59： The experiment requires more money than_______ A, have been put in