高考as考点用法小结
甘肃省民勤一中 高雪萍 733300
一. as作连词使用，引导状语从句
1. 引导时间状语从句。 当…的时候；随着；例如:
Babies sleep 16 to 18 hours in every 24 hours, and they sleep less as they grow. 婴儿每天睡觉十六到十八小时，随着他们的长大，睡觉时间越少了。
2. 引导原因状语从句，常位于句首。因为；由于；例如：
As he was wet all over, he decided to have a bath.因为全身都湿了，他决定洗个澡。
3. 引导方式状语从句。以……的方式; 例如:
When at Rome, do as the Romans do.入乡随俗
4. 引导比较状语从句。同……一样到某种程度；与……等同；例如:
He looks as ill as he sounded on the phone.
他的样子和他在电话中说话的声音反映的病情是一样的。
His eyes aren’t quite as blue as they look in the film.他的眼睛不像在电影中见到的那么蓝。
5.引导让步状语从句。虽然；尽管；其句型结构为名词/形容词/副词/动词+ as +主语+谓语。例如:
Young as I am, I already know what career I want to follow.虽然我还小，可是对要从事的事业已胸有成竹了。
Much as I admire David as a poet, I don’t like him as a man.
尽管David作为一名诗人，我非常赏识他，但作为一个男人，我不喜欢他。
二. as 作关系代词使用，引导定语从句
as引导定语从句时,有“正如,正像”的意思.既可以引导限定性定语从句,也可以引导非限定性定语从句,在从句中作主语、表语或宾语.
1. as引导限定性定语从句,构成the same…as, such…as等结构.如：
He is such a good teacher as everybody respects
2.as引导非限定性定语从句,说明整个句子.如:
As is known to everybody, Taiwan is a part of China. We must unify it.众所周知，台湾是中国的一部分，我们必须使它完整。
注意:as和which引导非限定性定语从句的区别是：which不能放在句首，而as则可以，在句中时，as有“正如，好像”之意，而which则没有。如：
She was always speaking highly of her role in the play, which, of course, made the others unhappy.她总是夸大自己在剧中所扮演角色的作用，这使其他人很不高兴。
As I had expected, the number of the audience was well over two thousand.正如我所预料的那样，观众的数量多于两千。
as引导的此类定语从句常用的有:as is said above, as is known to all, as it is, as is often the case, as is reported in the newspaper, as has happened等。
三．as if/as though引导的方式状语从句或表语从句。好像；似乎；仿佛。例如：
He behaved as if/as though nothing happened.他装作若无其事的样子。
四．as常见的其他考点有：
As a rule, the first bus will be here at six. (通常)
As a scientist, he was dedicated to the truth.（作为…）
When the car was repaired, it looked as good as new. （几乎）
As for you, you’d better be quick.（至于某人）
We had no idea at all as to what we ought to do.(至于…或关于…)
As far as I can see, there is only one possible way to keep away from the danger.（就…/据…）
As long as you keep on trying, I don’t really mind whether you can come top in your class.（只要…）
You must do your homework as carefully as possible .（尽可能…）
He has experience as well as knowledge.(连词词组，表示“同，不但…而且”)/He has knowledge and experience as well.(用于句末，意为“也”)