一、基本用法as...as用于比较句型,中间插入的是形容词或副词的原级。意思是"达到与什么相同的程度"。如:He is as strong as a horse. 他力大如牛。
二、习惯用法
1. as soon as 意思是"一......就......",引导一个时间状语从句。如:I'll call you as soon as I finish my homework. 我一完成我的作业,就给你打电话。
2. as long as 意思是"长达......之久;只要......"。如:She has searched the information about dinosaurs on the Internet as long as three hours. 她在因特网上搜索有关恐龙的信息已经长达三个小时。
3. as much as 意思是"高达......;与......一样多"。是用来表达极其多的语气。如:Some of the stones weigh as much as fifteen tons.有些石头重达15吨。
1、该结构的意思是“与,一
样”。接形容词或副词的原级,在否定句中,第一个 as 也可换成 so。如:He doesn't study as [so] hard as his broth。如果涉及数量或程度可用:as much+ (不可数名词+) as / as many+ (可数名词复数+) as。
2、在否定句或疑问句中可用so… as。 He cannot run so/as fast as you. 2)当as… as中间有名词时采用以下格式。 as +形容词+ a +单数名词 as + many/much +名词 This is as goo。
3、中间只能用形容词或副词的原级,不能用比较级或最高级。如果在第二个as之后使用独立的人称代词,一般说来用主格(较正式)或宾格(非正式)均可。在肯定句中用as…as, 在否定句中用not as…as或not so…as 均可。使用该结构要注意比较对象的一致性,即比较的双方必须是可以比较的同类人或物,否则会出错。