动词不定式

(共15张PPT)
动词不定式是非谓语动词的一种形式。
构成：to+动词原形
主语
表语
宾语
宾语补足语
定语
状语
动词不定式做主语
动词不定式做主语时，主要放在句首，多数情况是用it来开始一个句子，而把不定式置于后面。
It can save your time to make a list in the store.
列个单子可以节省你在商店购物的时间。
很容易犯错。
It’s easy to make mistakes.
It’s difficult to finish the work on time.
很难按时完成这项工作。
动词不定式做宾语
我希望能再次见到你。
I hope to see you again.
Don’t forget to turn off the light.
别忘了关灯。
我弟弟想当医生。
My brother wants to be a doctor.
她喜欢唱流行歌曲。
She likes to sing pop songs.
能以不定式作宾语的动词有：
agree , ask, choose, decide, forget, happen, hope, learn, like, love, manage, offer, remember, start, try, want, wish, prefer
作宾语补足语
动词+宾语+动词不定式
作宾语补足语
advise , allow, ask, force, help, invite, like, need, order, teach, tell, want
上周日我朋友邀请我参加他的生日宴会。
My friend invited me to go to his birthday party last Sunday.
请告诉她不要再迟到了。
Please tell her not to be late again.
有些动词后面需要跟不带to 的动词不定式作宾语补足语，常见的动词如下。
let , make, see ,hear, feel , watch, notice
这令你放松。
This makes you relax.
我听见她在隔壁看电视。
I heard her watch TV in the next room.
我迫使他们把钱还给了我。
I made them give me the money back.
作定语
不定式作定语时，必须放在被它修饰的名词或代词后面。
我有封信要写。
I’ve got a letter to write.
你想喝点什么？
Would you like something to drink
She is the first girl to go to college in her family.
她是她们家第一个上大学的女孩。
不定式作状语
作目的状语，常与in order to 或 so as to 连用，否定式是in order not to 或 so as not to
我来这看望朋友。
I come here to visit my friend.
我到英国来是为了了解更多的英国文化
I came to Britain so as to know more about British culture.
他太懒了，起不早。
He is too lazy to get up early.
做结果状语，常与too…to, enough…to, 或者so…as to…连用
He got up so late so as to miss the train.
他起床太晚了，因而错过了火车。