摘要: before 意为“在--之前 .引导时间状语从句时.表示主句的动作发生在从句的动作之前.例如: We cleaned the classroom before we left school yesterday.昨天离开学校之前.我们打扫了教室. He had been a cook before he went to college . 他上大学前曾当过厨师. after 意为“在--之后 .引导时间状语从句时.表示主句的动作发生在从句的动作之后.例如: After you use plastic bags, you mustn't throw them about. 你(们)用过了塑料袋之后.不准到处乱扔. He called me after he had finished his work. 他在工作完之后给我打了个电话. 注:若主句和从句两个动作发生的先后顺序十分接近.那么也可以不用完成时态.例如上面的第二句可改成:He called me after he finished his work.

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    Never try to work when you are very hungry. If you want to do your homework right after school, you
may want to eat something before getting to work. ①Always do your homework before you get too tired.
Don't wait till very late in the evening, or your homework will seem much harder than it really is. If you
have more than an hour's work, you should give yourself ②a break after an hour. On the other hand, ③you
should work at least half an hour at a time without stopping.

    Don't put it off (推迟) until the last minute. If you put off doing your homework, you will have it on your
mind, and you won't enjoy your free time so much. If you put it off until the end of a week or until right
before a test, you will have too much to do. A little each night, enough to keep up with (跟上) what is
happening each day in school, will take the fear out of tests and keep you on top of it.
    ④每天在同一个时间做作业. This will help you make it a habit. It will make part of your daily work
easier to do, and it will make your free time more enjoyable as well.
1. 改写①句且句意不变。________ you get too tired, you should ________ doing your homework.
2. ②处的a break意为 __________。 
    A. a sleep 
    B. a rest
    C. an idea
    D. a moment
3. 请将短文的③句翻译成中文。
    ______________________________________________________________
4. 请将短文的④句翻译成英文。
    ______________________________________________________________
5. According to the passage, when you have homework to do, you should _______. (可选多个答案).
    A. not put off doing your homework
    B. do your homework at the same time every day
    C. eat something to keep yourself not hungry
    D. have a short break after working for half an hour
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