英语什么后面加动词原形？
什么形式后面要加原型英语什么后面加动词原形？
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c..
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1、与助动词或情态动词do、does、did、shall、will、should、would、may、might、have to、must、need、ought to等一起构成谓语的动词时，要用原形。
2、used to+动词原形
used to+动词原形（过去经常…），这结构用于表示过去经常而现在不再有的习惯。比如：
He used to be a science teacher in a private school.
他曾是一所私立学校的自然常识教训。
3、to + 动词原形（不定式表示目的）
在一些句子或者短语后，想要表达做某事的目的，可以直接加上to do形式。也就是说，在任何一个句子后都可以写上to do（to+动词原形）表达作者的目的，期望。
He worked day and night to get the money.
他夜以继日地工作来赚钱。
4、be going to 的含义及结构
含义：表示按计划或安排要发生的动作，也可以表示推测将要或肯定会发生的动作，有“准备;打算”的意思。
结构：be going to 后面需要接动词原形。
注：句子中时常有表示将来的时间状语。
The board of directors are going to hold a meeting this Friday.
周五董事会准备召开会议。(安排)
It is thundering outside. It's going to rain.
看那些乌云，快要下雨了。(推测)
扩展资料
1、see sb. do sth. 看到某人做了某事
I saw a big bird fly over the roof of the house yesterday.
昨天，我看到一只大鸟飞过了屋顶。
2、watch sb. do sth. 观看某人做了某事
I watched the thief steal money from others' pockets.
我看到这个小偷从别人的口袋里偷了钱。
3、notice sb. do sth. 注意到某人做了某事
I noticed him leave the room.
我注意到他离开了房间。
4、observe sb. do sth. 观察到某人做了某事
He has observed the girl come into the house.
他观察到女孩进了屋。
5、look at sb. do sth. 看着某人做了某事
I looked at him do his homework just now.
刚才，我看着他做了他的作业。
6、hear sb. do sth. 听到某人做了某事
I heard him sing an English song half an hour ago.
半个小时前，我听到他唱了一首英文歌曲。
7、listen to sb. do sth. 听着某人做了某事
I listened to him read the passage aloud in English yesterday.
昨天，我听着他用英语朗读了这段话。
8、make sb. do sth. 使某人做某事
I made the students elect a monitor.
我让学生们推选一位班长。
9、let sb. do sth. 让某人做某事
Let me help you wash your clothes.
让我帮你洗衣服吧。
10、have sb. do sth. 使某人做某事
My mom haves me do some housework every weekend.
我妈妈每周末让我做一些家务。
11、feel sb. do sth. 感觉某人做了某事
I felt the rain drop on the roof last night.
昨晚我感觉到雨点打在了屋顶上。
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