關於非謂語動詞不定式中不加to的幾種形式
不定式基本形式:to+動詞原形,其中有一部分不定式是沒有to的,那麼哪些情況下,不定式沒有to呢?
1、感官動詞
這幾個感官動詞feel ,hear ,smell,look,在主動語態裡後接動詞原形(無to)。
例如:
I saw him sing。
I heard you play the piano。
He feels him fly。
I watched the girl cross the
road。
2、使役動詞
使役動詞let、 have 、make後接不定式沒有to。
例如:
You must have your son see his own mistakes。
Let me go。
Don‘t make her laugh。
3、在why not 後沒有to,基本結構可記憶why not do 更容易
(1)表示提建議
例如:
Why not go with him?
Why not have a rest?
(2)表示認為沒有必要
例如:
Why worry。 you can’t do anything about it ?
Why waste?
4、had better do 最好做…和
would rather do 寧可做…後面的不定式沒有to。 ‘
You’d better drink the water
now。 or you will not be fine。
I would rather go by bus now
5、Will you please do 徵求意見,求助。
例如:
Will you please open the window?
Will you please give me a
hand ?
6、help 可以有to 也可以沒有
to
Help the boy to carry the
heavy box。
Help the old man water the
flowers。
7、can‘t … but …,do nothing …but…結構中沒有to
例如:
We can’t choose but obey(服從)
He can‘t help but feel sorry for her。
We do nothing but wait。
以上是常用的不定式中不帶to的幾種情況,但是如果在被動語態中還是有to的,例如:
I saw her dance
She was seen to dance
Make her laugh
She was made to laugh
這些情況在被動語態裡在詳細講解。