祈使句有哪些特点?——Alice,you do the washing-up after the party,will you?题干中“you do the washing-up after the party"为什么是祈使句?

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祈使句有哪些特点?——Alice,you do the washing-up after the party,will you?题干中“you do the washing-up after the party

祈使句有哪些特点?——Alice,you do the washing-up after the party,will you?题干中“you do the washing-up after the party"为什么是祈使句?
祈使句有哪些特点?
——Alice,you do the washing-up after the party,will you?
题干中“you do the washing-up after the party"为什么是祈使句?

祈使句有哪些特点?——Alice,you do the washing-up after the party,will you?题干中“you do the washing-up after the party"为什么是祈使句?
祈使句
祈使句表示请求、命令、建议等等.谓语动词一律用原形.句子中通常不用主语,句末用惊叹号或者句号,用降调.
1含有第二人称主语的祈使句
Be careful!小心!
Don''t make such a noise.不要这么吵.
1.肯定的祈使句
a.句型:动词原形~.(省略主语)
Stand up.起立.
Be quiet,please.请安静.
b.有时,为了加强语气,可以在动词之前加do
Do sit down.
务必请坐.
Do study hard.
一定要努力学习.
比较
祈使句和陈述句陈述句:
You sit down.
你坐下来.
祈使句:
Sit down.坐下
(省略主语you)
c.用客气的语气表示祈使句时,可在句首或句尾加上please,但如果在句尾加please,那在please之前一定要加一个逗号“,”.
Go this way,please.
请这边走.
d.祈使句中如果有唤语,一定要用逗号“,”隔开,放在句首或句尾.
Li Ming,come here.
李明,过来.
Come here,Li Ming.
过来,李明.
2.否定的祈使句
句型:Don''t +动词原形~
Don''t swim in the river.
别在河里游泳.
Don''t be late.别迟到.
Please don''t be noisy.
请不要大声喧哗.
注意
表示禁止时,尤其是标语等也可用“No+动名词”来表示.
No smoking.
禁止吸烟.
No parking.
禁止停车.
句型转换
祈使句与陈述句的改写
1.祈使句=You must …(陈述句)
Come here .过来.
=You must come here .
你必须过来.
Don''t do that again.
你一定不可以再那样做了.
2.Please +祈使句=Will you (please) (陈述句)
Please help me .请帮帮我.
=Will you (please) help me?
你愿意帮我的忙吗?
Come here on time ,please .请准时到这儿.
=Will you (please) come here on time
请你准时到好吗?
2含有第一、第三人称主语的祈使句
Let''s say good-by here.
我们在此道别吧.
Don''t let him do that again.
别让他再那么做了.
1.肯定的祈使句
句型:·Let+第一人称(me,us)~.
·Let+第三人称代词(宾格:him,her,it,them)或名词~.
Let''s go at once.
咱们马上动身吧.
Let me try again.
让我再试试.
Let Tom go there himself.
让汤姆自己去那儿.
注意
Let''s包括对方,Let us不包括对方.反意疑问句时最明显.
Let''s go,shall we?
咱们去吧,怎么样?
Let us go,will you?
让我们去吧,行吗?
(征求对方的意见)
2.否定的祈使句
句型:·Let''s(us,me)+not +动词原形~.
·Don''t let +第三人称代词的宾格或名词+动词原形.
Let''s not say anything about it.
对于这件事,咱们什么也不要说.
Don''t let them play with fire.
别让他们玩火.
句型转换
祈使句有时相当一个if引导的条件状语从句.
祈使句:Use your head and you''ll find a way.
条件句:If you use your head,you''ll find a way.
如果你动动脑筋,你就会找到方法.
注意
回答Let''s~的反意疑问句句型时,肯定时用Yes,let''s.否定时用NO,let''s not.
祈使句变反意疑问句的方法:
祈使句后的反意疑问句形式
a,Let's表示说话人向对方提出建议,简短问句的主语用 we表示,问句用 shall we或 shan't we 如:Let's have a cup of tea ,shall we (shan't we)
b,Let me或 Let us表示听话人提出请求,问句用 will you或 won't you .
Let me have a rest ,will you (won't you )
c,其它的祈使句后可以加一个简短问句,使语气变得客气一些.
如:Have a rest ,will you
Stand up ,will (won't) you
祈使句用以表达命令,要求,请求,劝告等.
1) 祈使句有两种类型,一种是以动词原形开头,在动词原形之前加do (但只限于省略第二人称主语的句子).
Take this seat.
Do be careful.
否定结构:
Don't move.
Don't be late.
2) 第二种祈使句以let开头.
Let 的反意疑问句
a.Let's 包括说话者
Let's have another try,shall we / shan't we?
= Shall we have another try?
b.Let us 不包括说话者
Let us have another try,will you / won't you?
= Will you please let us have another try?
否定结构:
Let's not talk of that matter.
Let us not talk of that matter.

祈使句的作用是要求、请求或命令、劝告、叮嘱、建议别人做或不做一件事。

为陈述句语气 没有问号