should的`用法：
should用來提出建議和忠告，後邊加動詞原形，否定句直接在should後邊加not.
例如：I think you should eat less junk food.
我認為你應該少吃垃圾食品。
She drives a lot and she seldom walks. So I think she should walk a lot.
她經常開車，很少走路。所以我認為她應該多走路。
Students shouldn’t spend too much time playing computer games.
學習向別人提建議的幾種句式：
(1)I think you should…
(2)Well, you could…
(3)Maybe you should …
(4)Why don’t you…?
(5)What about doing sth.?
(6)You’d better do sth.
練一練
用should或shouldn’t填空
1. I can’t sleep the night before exams.
You ______ take a warm shower before you go to bed.
2. Good friends ______ argue each other.
3. There is little milk in the glass. We _______ buy some.
4. They didn’t invite you? Maybe you ______ be friendlier.
5. I am a little bit overweight. So I think I _______ do exercises every day.
答案：1. should 2. shouldn’t 3. should 4. should 5. should
