高中英语语法——祈使句(31张PPT)

had 构成。
7. Don’t forget to phone me, ______?
A. do you
B. needn’t you
C. won’t you
D. will you
否定祈使句的反意疑问句用will 构成。
8. Let’s have a cup of tea, ________?
A. shall you
4. 祈使句+波折号+附加信 息；附加信息常表示发出祈使动
作的原因。 e.g. Put on your coat, please—it’s very cold outside.
Turn down the TV set—the baby is asleer there ___ you’ll be able to
stay
三.祈使句中应注意的 几个问题
What is different now?
n Do be patient! n Do sit down. n Do write back when you receive his letter. n Tom, you clean the room. n Don’t you be late again next time!
Don’t let him go. / Let him not go.
③ 有些可用no开头, 用来表示禁止性的祈使句。 如:禁止吸烟！禁止钓鱼！
No smoking!
No fishing!
用祈使句完成下列句子。
go, keep, look, ride, stop, stay, watch out
1. _G_o___ on the pavement （人行道）. 2. _R_i_d_e_ in the bicycle lanes. 3. S__to_p___ at red traffic lights. 4. _K_e_e_p__ the rules of the road.
1.加强祈使句语气的方式:
Do / you+动词原形
2.祈使句(,) +and / or+ 简单句
是一种固定句式。
此句型为“条件与结果”并存的句式，其 中的祈使句可转化为if条件句。
e.g. Work hard and you will succeed. = If you work hard, you will succeed. Hurry up, or you will miss the last bus. = If you don’t hurry up, you will miss the last bus.
A. When left
B. Leaving
C. If you leave D. Leave
B. will you
C. shall we
D. won’t you
以let’s 开头的祈使句用shall we, 以let us开头的祈使句用 will you, 构成反意 疑问句。
9.________, I think, and the problem could be settled. A. If you don’t doubt your efforts B. As you keep up your spirits C. Making great efforts D. A bit more efforts
禁止等的句子叫做祈使句。
Look at the following sentences:
Go and wash your hands. （去洗手。——命令） Be quiet, please.（请安静。——请求） Be kind to our sister. （对姊妹要和善。——劝告） Look out！Danger！（小心！危险！—警告） Keep off the grass. （勿践草坪。——禁止）
saved.
A. Giving B. Give C. Given D. To give
8. ___A___ this book and tell me what you think of it.
A. Look through B. Look on
C. Look into
D. Look up
9. __D______it with me and I‘ll see what I can do.
see it better.
A. or B. while C. but D. and
2. ________ remember to turn off
the lights before you leave the lab.
A. Be sure
B. Do
C. Make sure
D. Does
3. Let us pass, _______?
Grammar Imperatives
(祈使句)
What do they mean?
No smoking!
Parking!
Don’t drink!
Attention！
Grammar-1. Look & Say Look at the signs and say what they do.
Don’t go faster
A. shan’t we B. shall we
C. won’t we D. will you
4. Wait a minute, ______?
A. shall you
B. will you
C. do you
D. don’t you
5. ___ down the radio—the baby’s asleep
这一句式也可以演变为“名词 性短语+and+简单句”的形式。
More time, and I could have done it better. 如果多给我一些时间，我可以做得更好。
3.祈使句的附加疑问句
Open the door, w__il_l _y_o_u_?_/（__w__o_n_’__t ___? DDon’t forget, _y_ow_u_i）l_l _y_o_u_________? Let uuss go there, _w_i_ll_y_o_u________? Let’s go there at once,s_h_a_ll_w__e____?
environment.
2. Conclusion
◆ 肯定结构:
Do 型 （以行为动词开头）
Stand up! Don’t stand up! / Never stand up! Be 型 （以be动词开头）
Be careful. Don’t be late./ Never be late. Let型 （以let开头）
--- ___B_____ . A. Yes , I won’t B. No , I won’t C. No , I will D. Yes， I will
5. Be sure to write to us, ___A_____? A. will you B. aren’t you C. can you D. mustn’t you
6. One more week, __C____ we will accomplish the task. A. or B. so that C. and D. if
Grammar-6. Practice
7. ___B__ blood if you can and many lives will be
go, keep, look, ride, stop, stay, watch out
5.W__a_t_ch__o_u_t_ for pedestrians （行人）. 6. _L_o_o_k__ behind you before you turn
right or left. 7. _D_o_n__’__t ___ in the middle of the road.
Let him in.
Let me help you.
◆ 否定结构: ① Do型和Be型的否定式都是在句首加don’t构成。
如:不要忘记我!
Don’t forget me! /Don’t be late! ② 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:别让他走。
10. It’s really very dangerous. One
more step, ______the baby will
fall into the well.
A. or
B. so that
C. and
D. if
Grammar-6. Practice (3ms)
1. --- English has a large vocabulary, hasn’t it? --- Yes. ___A____ more words and expressions and you will find it easier to read and communicate.
in the next room. A. Turning B. Turned 祈C.使Tu句rn以动词原D.形To开tu头rn。
6 You’d better not smoke here,
_______?
A. will you
B. shall you
C. have you
D. had you
有had better 的句子构成反意疑问句, 用
He is always sleeping in the class. (×) It’s a beautiful day, isn’t it?(×)