來源:中考網(wǎng) 作者:紫涵 2013-01-30 16:04:57
1.作主語。 如:
To learn English is very important.
但實際上不定式作主語常用 it來作形式主語,而將不定式移至謂語動詞后作真正的主語。
如上句可表達(dá)為:
It's very important to learn English.
2.作表語。 如:
My idea is to ring him up at once.
3.作賓語。 如:
I have decided to go to Binjiang Primary School.
4.作賓語補足語。
a. ask, want, teach, tell, know, would like, allow等動詞后面接動詞不定式作賓語補足語。
如: The policemen asked him to get off the bus.
b. hear, see, look at, feel, watch, notice, listen to等動詞后接不帶to的動詞不定式作賓語補足語。
如: We often see Miss Li clean the classroom.
c. let, make, have這些使役動詞后接不帶to的動詞不定式作賓語補足語。但在被動語態(tài)中這些不帶to的都須帶上to。
如: In those days the bosses often made the workers work day and night.
d.動詞help接動詞不定式作賓語補足語,可帶to也可不帶to。
如: Can you help me (to) carry the heavy bag?
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