英语句子动词开头,什么时候用原形,什么时候用ING,什么时候用不定式啊? 如果在英语中，句子的开头是动词，那么这个动词什么时候用原型，...

\u82f1\u8bed\u53e5\u5b50\u5f00\u5934\u7684\u52a8\u8bcd\uff0c\u4ec0\u4e48\u65f6\u5019\u7528\u4e0d\u5b9a\u5f0f\uff0c\u4ec0\u4e48\u65f6\u5019\u7528\u52a8\u540d\u8bcd\uff0c\u4ec0\u4e48\u65f6\u5019\u7528\u52a8\u8bcd\u539f\u5f62

\u4e00\u822c\u6765\u8bf4\uff0c\u5f53\u4f60\u60f3\u8868\u793a\u67d0\u79cd\u76ee\u7684\u65f6\uff0c\u5f00\u5934\u5c31\u7528\u52a8\u8bcd\u4e0d\u5b9a\u5f0f\uff1b
\u5f53\u4f60\u4ec5\u4ec5\u662f\u60f3\u7701\u7565\u5f00\u5934\u7684\u4e3b\u8bed\u65f6\uff0c\u90a3\u4e48\u5f00\u5934\u7684\u52a8\u8bcd\u5c31\u8981\u7528\u52a8\u540d\u8bcd\uff0c\u539f\u56e0\u5f88\u7b80\u5355\uff1b
\u5f53\u4f60\u60f3\u8868\u793a\u7948\u4f7f\u53e5\u8bed\u6c14\u65f6\uff08\u6bd4\u5982\u547d\u4ee4\u3001\u65a5\u8d23\u3001\u54c0\u6c42\u7b49\uff09\uff0c\u5c31\u7528\u539f\u5f62\u3002

\u4e50\u610f\u89e3\u7b54\uff1a
\u5f53\u8981\u7528\u52a8\u8bcd\u76f8\u5173\u7684\u52a8\u4f5c\u4f5c\u4e3b\u8bed\u65f6,\u52a8\u8bcd\u8981\u7528+ing\u5f62\u5f0f.
Smoking is bad for your health.

\u7528\u52a8\u8bcd\u539f\u5f62\u7684\u51e0\u60c5\u51b5
1.\u52a0\u52a9\u52a8\u8bcddo, does\u6216did \u7684\u80af\u5b9a\u53e5\u53d8\u6210\u5426\u5b9a\u53e5\u65f6\uff0c\u5176\u540e\u9762\u7684\u52a8\u8bcd\u8981\u7528\u52a8\u8bcd\u539f\u5f62\uff1b
He didn\u2019t work hard at English last term.
2.\u60c5\u6001\u52a8\u8bcd\u540e\u9762\u8981\u7528\u52a8\u8bcd\u539f\u5f62\uff1b
Must I be at home tonight?
3.be going to, will, shall \u7b49\u6784\u6210\u7684\u5c06\u6765\u65f6\u6001\uff0c\u5176\u540e\u9762\u7684\u52a8\u8bcd\u8981\u7528\u52a8\u8bcd\u539f\u5f62\uff1b
There will be on a new interesting film at the cinema.
4.\u7948\u4f7f\u53e5\u8981\u7528\u52a8\u8bcd\u539f\u5f62\uff1bBe careful, Lin tao!
5.let\u5f00\u5934\u7684\u7948\u4f7f\u53e5\uff0c\u5176\u540e\u9762\u7684\u52a8\u8bcd\u8981\u7528\u52a8\u8bcd\u539f\u5f62\uff1b
Let\u2019s have a look at the pictures.
6.had better \u540e\u9762\u8981\u7528\u52a8\u8bcd\u539f\u5f62\uff1b
you\u2019d better put on more clothes. It\u2019s very cold outside.
7.why not \u4e4b\u540e\u8981\u7528\u52a8\u8bcd\u539f\u5f62\uff1b
Why not come a little earlier?= Why don\u2019t you come a little earlier?
8.\u52a8\u8bcd\u4e0d\u5b9a\u5f0fto\u4e4b\u540e\u8981\u7528\u52a8\u8bcd\u539f\u5f62\uff1b
Please give me something nice to eat.
9.feel, hear, see, watch \u7b49\u611f\u5b98\u52a8\u8bcd\u4e4b\u540e\u8981\u7528\u52a8\u8bcd\u539f\u5f62\u3002\u5982\u679c\u8868\u793a\u8fd9\u4e00\u52a8\u4f5c\u6b63\u5728\u8fdb\u884c\uff0c\u5c31\u7528\u73b0\u5728\u5206\u8bcd\u3002
Sometimes we can hear a girl sing in the room.
I feel my left leg hurting badly.

\u8868\u793a\u76ee\u7684\u65f6\uff0c\u4e00\u822c\u7528\u4e0d\u5b9a\u5f0f to do\u5f00\u5934\u3002
\u5e0c\u671b\u80fd\u5e2e\u5230\u4f60\uff01

原则上讲英语句子是不能用动词原形开头的，但是祈使句中常常省略了Please,或将please放在句末。例如please open the door我们往往说成 open the door please ！或直接用 Open the door。因此只有在祈使句中用动词原形开头。你所说的动词ING形式实际是动名词，当动词加上ING后可以说是动名词或现在分词而现在词是不可以做主语的，动名词和不定式都属于非谓语动词。若指一个抽象动作时用ING而指某一次具体的动作时候用不定式例如：
Riding bike can make a man smart.骑单车能是一个人敏捷。To complete the porgram deeds much effort完成这个项目需要很大的努力。在就是动名词表示主动意义而不定式往往表目的。

祈使句用原型
动名词时候用ing
表目的时用不定式

建议你最好背句子，不然动词不同，规则不同。

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