Do型(即:动词原形(+宾语)+其它成分)。如:Please have a seat here. 请这边坐。有的祈使句在意思明确的情况下,动词可省略。如:This way,please. = Go this way,please. 请这边走。
Be型(即:Be +表语(名词或形容词)+其它成分)。如:Be a good boy! 要做一个好孩子!
Let型(即:Let + 宾语 + 动词原形 + 其它成分)。如:Let me help you. 让我来帮你。
否定结构:
Do型和Be型的否定式都是在句首加don't构成:如:Don't forget me! 不要忘记我!Don't make such a noise.不要这么吵。Don't be late for school! 上学不要迟到!(是系表结构--也就是没有行为动词但是有形容词的那种--就可以使用Don't be,有行为动词的就不能这么用,只能用Don't。)
Let型的否定式有两种:"Don't + let +宾语+动词原形+ 其它成分"和"Let + 宾语 + not + 动词原形 + 其它成分"。如:Don't let him go. / Let him not go. 别让他走。
例:Let's run to the police station on fourth street.我们跑去第四大街上的警察局吧。
2、否定句的祈使句的结构
(1)Don't+动词原形
例:Don't eat in the classroom.不要在教室里吃东西。
(2)Let's+ not+动词原形
例:Let's not say anything about it.对于这件事,咱们什么也不要说。
(3)用否定副词never构成,以加强否定含义
例:Never judge a person by looks.绝不能以貌取人。
向左转|向右转
3、May I suggest
我可以建议.....吗?
A: I am so frustrated with this book I can’t get anywhere near to the end of it and I have to finish it by Wednesday!
A:我对这本书感到非常失望,我就是读不到结尾,我得在星期三之前读完它!
B: May I suggest that you set yourself a target and try to read a certain amount of pages per day until you reach your target?
B:我能建议你这样做吗?就是给自己定一个目标,每天读一定数量的网页,直到你达到目标为止。
4、Couldn’t you
你不能......吗?
A: I’m panicking, I need to get to London on Wednesday to meet up with my friends. They are all driving there but I don’t have a car!
A:我很紧张,我得在星期三去伦敦见我朋友。他们在那里都开车,但我没有车!
B: Couldn’t you just get a lift with one of them?
B.你不能找其中一个有车的朋友搭便车吗?
5、Wouldn’t it be better
......会不会更好呢?
A: I don’t know whether I should take this new job or stay with my current one. It’s a big opportunity for me but it would mean I would need to move house. I don’t know what I want.