倍数as...as的用法

倍数as...as的用法如下：

as...as意为"和……一样",表示同级的比较.使用时要注意第一个as为副词,第二个as为连词.其基本结构为：as+ adj./ adv. +as.例如：

(1)This film is as interesting as that one.这部电影和那部电影一样有趣。

(2)Your pen writes as smoothly as mine.你的钢笔书写起来和我的一样流畅。

其否定式为not as/so +adj./ adv. +as.例如：

This dictionary is not as/so useful as you think.这本字典不如你想象的那样有用。

若有修饰成分,如twice, three times, half, a quarter等,则须置于第一个as之前。例如：

Your bag is twice as expensive as mine.你的袋子比我的贵一倍。

几个关于as...as的常见句型：

(1)as...as possible

Please answer my question as soon as possible.请尽快回答我的问题。

(2)as...as usual/before

She looks as pretty as before.她看起来和以前一样漂亮。

(3)as long as... (引导条件状语从句)。

It took us as long as three years to carry out the plan.我们花了长达三年的时间才完成这项计划。