請(qǐng)看下面一道題：This is the very work that I must finish _________ her.
A. to help???????????????? B. help??????????????????? C. helping????????????????? D. helped

有的同學(xué)一看到動(dòng)詞 finish，便斷定其后空格肯定填動(dòng)名詞，即斷定此題答案選C。其實(shí)錯(cuò)了，正確答案應(yīng)是 A。不錯(cuò)，finish 后接動(dòng)詞作賓語(yǔ)時(shí)，該動(dòng)詞要用動(dòng)名詞，而不用不定式，但是本句空格處填的動(dòng)詞help 并不是 finish 的賓語(yǔ)，正確的句子分析是：that I must finish 是修飾名詞 the very work 的定語(yǔ)從句，finish 的賓語(yǔ)是引導(dǎo)該定語(yǔ)從句的關(guān)系代詞 that，其后的不定式 to help her 是目的狀語(yǔ)。全句意為“為了幫助她，這就是我們必須要完成的工作?！闭?qǐng)?jiān)倏搭?lèi)似例題：

(1) What the children enjoy _________ to play outside.
A. being???????????????????? B. to be??????????????????? C. is????????????????????????? D. are
答案選C，而不選A。what the children enjoy 是主語(yǔ)從句，空格處填的 is 為謂語(yǔ)動(dòng)詞。

(2) What else would you mind _________ money?
A. make????????????????????? B. making???????????????? C. to make???????????????? D. made
答案選C，而不選B。動(dòng)詞mind 的賓語(yǔ)是句首的疑問(wèn)詞 what，而不是其后的動(dòng)詞 make；不定式用作目的狀語(yǔ)。

(3) Nothing that he suggested _________ useful.
A. prove???????????????????? B. proved?????????????????? C. proving???????????????? D. to prove
答案選B，而不選C。句子主語(yǔ)是 nothing；that he suggested 是修飾主語(yǔ)的定語(yǔ)從句，suggested 的賓語(yǔ)是引導(dǎo)該定語(yǔ)從句的關(guān)系代詞 that，而不是其后的動(dòng)詞；句子謂語(yǔ)是 proved。全句意為“他建議的情況沒(méi)有一條是有用的。”

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