类似的还有clean ,lock ,write ,play ,start ,cut等。
八、最后要说的是另一种情况：英语中有不少动词及动词短语常用被动形式来表示主动的含义。
1．Be seated, please!
2．We must be prepared for the worst.
类似的还有be determined to ,be absorbed in , be gone , be married to , be hidden , be interested in ……and advanced mathematics ,experienced school , learned man 等中这些定语用的过去分词也是用过去分词表主动。
I dreamed a good dream.我做了一个好梦
一般不会说 A good dream was dreamed.
AS的基本用法
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。
★as...as用法：
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。 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