大學英語四級語法精要：非謂語動詞
導語：小編收集了一些四級的語法知識點，希望能帶給您幫助
1) 功用: 不定式可以作主語 (a), 賓語 (b), 表語 (c), 定語 (d) 或是狀語 (e).
a. To scold her would not be just.
b. We are planning to build a reservoir here.
c. One of our main tasks now is to mechanize agriculture.
d. Do you have anything to declare?
e. We have come to learn from you.
2) 不帶to 的不定式:
a) 在“動詞+ 賓語+不定式”結構中, 如果動詞是表示感覺意義的see, hear, watch, smell, feel, notice等, 或是表示“致使”意義的 have, make, let等, 其后的不定式結構不帶to.
John made her tell him everything.
這類結構轉換為被動語態時, 后面的`不帶to 的不定式一般還原為帶to 的不定式.
She was made to tell him everything.
b) 在 had better, had best, would rather, would sooner, would just as soon, might (just) as well, cannot but 等搭配之后, 動詞不定式也不帶to.
I’d rather not have eggs and bacon for breakfast.
They cannot but accept his term.
c) 在make do, make believe, let drop, let fall, let fly, let slip, let drive, let go of, let there be, hear say, hear tell, leave go of等固定搭配中, 用不帶to的動詞不定式.
John let fly a torrent of abuse at me.
I’ve heard tell of him.
d) 在動詞help(或help +賓語)之后可用不帶to的不定式, 也可用帶to的不定式.
Can I help (to) lift this heavy box?
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