as也可代表先行词、主句或主句一部分。但as有“正如”的意义,其从句可放在主句前或后,如:
The Nanjing Changjiang River Bridge,as we all know, was compl-
eted in 1969.我们都知道南京长江大桥,它建成于一九六九年。(as代表先行词)
To shut your eyes to facts, as many of you do, is foolish.(如)你们许多人(所做的那样)对事实视而不见是愚蠢的。(as代表主语部分)
As we know, the earth is round.
我们知道,地球是圆的。
ask for 要求,请求
ask sb.for sth.向(某人)请求 (要求)……
She asked for some advice on how to learn English well.
at表示速度、价格、利率
at a high/low price以高价/;低价;at 40 miles an hour 以每小时40英里的速度;at a high/low speed以高速/慢速;at an ordinary speed 以普通速度;at full/top speed以全速/高速;at a speed of 以……速度。
[应用]完成句子
The company decided to sell the TV sets _
__ _
__ __
_
。
150英里的速度前进。
The train was running ______ _____ ______ _______150 miles an hour .
Key:①at, a, low, price②at,a, speed,of
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