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。