思馬得英語100個句子學(xué)英語語法（52）：關(guān)于不定式用法的注意點

　　<例句>

　　She tried to explain.

　　她試圖解釋一下。

　　<語法分析>

　　有些動詞可以用不定式直接作賓語，如try, want, like, wish, hate, mean, pretend, begin, decide, learn, determine和 expect 等。還有些動詞不能直接跟不定式作賓語，需用it代替不定式作賓語，這些動詞有find, make, think, consider 和feel 等。也有些動詞不能直接跟不定式作賓語，需在不定式前加連接代詞或連接副詞。有些動詞可以跟不定式作賓語補語，如 love, teach, ask, get, tell, invite, force, oblige 和 beg 等。

　　<觸類旁通>

　　(1) Her father cannot afford to buy her a bike.

　　她的爸爸無法給她買輛自行車。

　　語法分析：不定式直接作賓語。

　　(2) I thought it impossible to arrive that place in one hour.

　　我認(rèn)為一個小時到達(dá)那個地方是不可能。

　　語法分析：it代替不定式作賓語。

　　(3) Does she know which to take?

　　她知道要哪一個嗎?

　　語法分析：動詞know不能直接用不定式作賓語，需在不定式前加連接代詞或連接副詞。

　　(4) She asked me to help her with lessons this evening.

　　她請我晚上幫她補習(xí)功課。

　　語法分析：有些動詞可以跟不定式作賓語補語。

　　(5) I wait for you to decide.

　　我等你做出決定。

　　語法分析：有些動詞也可跟不定式作賓語補語。

　　(6) Listen to me read the text.

　　聽我讀課文。

　　語法分析：使役動詞和某些感官動詞后可接不定式作賓語，在主動語態(tài)里，不定式省去to。

　　<鞏固練習(xí)>

　　1. The birds refused ____[take] him back.

　　2. She decided _____[do] some experiments to test her theory.

　　3. He pretended _____[finish] it.

　　4. This has made it necessary for agriculture and industry _____[develop] very quickly.

　　5. Do you consider it better not _____[go].

　　6. They know _____ to do it.

　　7. Nobody knows _____ to do next.

　　8. I've forgot ____ way to take.

　　9. She got young girls _____[learn] nursing there.

　　10. I ask Tom _____[lend] me some money.

　　11. I long for you ____[see] him.

　　12. I hope you'll advise me what _____[do].

　　13. He made some candles _____[give] light.

　　14. I made a big fire _____[keep] off the wild animals.

　　15. I have found her _____[be] friendly.

　　<參考答案>

　　1. to take 2. to do 3. to have finished 4. to develop 5. to go 6. how 7. what 8. which 9. to learn 10. to lend 11. to see 12. to do 13. to give 14. to keep 15. to be