預約高中1對1精品課程(面授/在線),滿足學員個性化學習需求 馬上報名↓
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不定式動詞主要包括以下類別:
1)情態(tài)動詞(除ought外,ought to):
2)使役動詞let,have,make:
3)感官動詞see,watch,look at,notice,observe,hear,listen to,smell,feel,find等后作賓補,省略to。
注意:在被動語態(tài)中則to不能省掉。
I saw him dance.
=He was seen to dance.
The boss made them work the whole night.
=They were made to work the whole night.
4)would rather,had better:
5)Why…/why not…:
6)help可帶to,也可不帶to,help sb(to)do sth:
7)but和except:but前是動詞do時,后面出現(xiàn)的動詞用不帶to的動詞不定式。
8)由and,or和than連接的兩個不定式,第二個to可以省去:
9)通常在discover,imagine,suppose,think,understand等詞后,可以省去to be:
He is supposed(to be)nice.他應該是個好人。
舉例:
He wants to move to France and marry the girl.
He wants to do nothing but go out.
比較:He wants to do nothing but go out.
He wants to believe anything but to take the medicine.
典型例題
1)----I usually go there by train.
----Why not ___ by boat for a change?
A.to try going B.trying to go C.to try and go D.try going
答案:D.why not后面接不帶to的不定式,因此選D。
2)Paul doesn't have to be made ___.He always works hard.
A.learn B.to learn C.learned D.learning
答案:B.make后接不帶to的動詞不定式,當其用于被動時,to不可省略。