act的用法说明
一、用作名词
1. [C]行为，行动，举动：
a kind act 善举
acts of terrorism 恐怖行动
2. [C]法令，条例：
The act was passed by Congress and went into effect in August,1950. 这项法令由国会通过，于1950年8月生效。
3. [C]一幕：
We especially enjoyed the third act of the play. 我们特别喜欢戏的第3幕。
【常用短语】
in the act 当场，正在：
He was caught in the act of stealing a car. 他偷汽车时被逮个正着。
二、用作动词
1. 行动，做事，举止：
Think before acting. 三思而后行。
The boy acted very badly at school. 男孩在学校里表现得很不好。
2. 扮演，演戏：
She was just acting and wasn’t really sorry. 她只是装模作样，并不真的很难过。
3. 担任，充当：
He acts as head of department when his boss is away. 老板外出时，他担当部门主任。
4. 起作用，生效：
The medicine acted on his fever at once. 这药立刻使他退了烧。vt. 扮演：
He acted Hamlet very well. 他扮演哈姆雷特很出色。
【常用短语】
act as 充当，起…的作用：
He acted as manager in my absence. 我不在时他担任经理。
act for 代理，代表：
Please act for me during my absence. 我不在时请代理我处理事务。
act on 按…行动；作用于，影响：
The drug acts on the stomach. 这药对胃有效。
act one’s age 行为和年龄相称，不再孩子气了：
It’s time you started acting your age, Jeff. 杰夫，你该懂事了。
act out 表演出来：
Let’s act out the story of the three bears once more. 让我们再把这三只熊的故事表演一次吧。
act up 捣蛋，表现不好；出毛病；在…身上发作：
Don’t act up. 别捣蛋。
My leg has been acting up on me. 我的腿疾一直缠绕着我。
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