【練習】

1. Taking this medicine, if _____(continue) , will of course do good to his health.?（填空練習）

答案：continued

解析：if continued 是“if taking this medicine is continued”的省略形式。

2. In the face of the big fire in October in California, many people in the fire-stricken areas moved out ?_____(escape ; burn)???（填空練習）

答案：?to escape being burned不定式作目的狀語。

解析：?escape 意為“逃脫”，不接不定式，而常接-ing形式作賓語。只能接-ing形式作賓語的動詞還有:mind， admit，avoid，appreciate，consider(考慮)， delay， imagine，miss，practice等。

3.?O'Neal works hard.He is often seen ＿＿＿heavily before his teammates start.

d?? be sweated?? ng?? sweated

答案：C

解析：分詞在句中作主語補足語。因sweat這一動作是he所發(fā)出，所以為主動。

4.?I remained _______ long after I had been told the story.

A. puzzling ? B. puzzled ? ? C. being puzzled ? ?D. to be puzzled

答案：?B

解析：??puzzled 表主語感到迷惑不解的，puzzling 表令人迷惑不解的，beingpuzzled強調(diào)正在進行的被動動作，to be puzzled表在主句謂語之后發(fā)生。

5.?I can hardly imagine Peter_______?across the Atlantic Ocean in 15 days.

sail?? g?? have sailed

答案：?C

解析：?Peter為邏輯主語，與sailing構(gòu)成復合結(jié)構(gòu)，作imagine的賓語。

6.?I _____(drive) along the quiet road at forty miles an hour, and then an old man suddenly started to cross the road in front of me.??（填空練習）

答案：was driving

解析：?因句中有連詞and，所以and 之前必須是一個并列關(guān)系的分句。

【小知識】復合結(jié)構(gòu)動詞不定式

復合結(jié)構(gòu)不定式：由for + 名詞（或代詞賓格）+ 動詞不定式即構(gòu)成復合結(jié)構(gòu)的動詞不定式。

其中for本身無意義。for后面的名詞或代詞是不定式的邏輯主語，這種不定式在句中可作主語、表語、賓語、定語或狀語，如：It is very important for us to get everything ready for the harvest.

當作表語用的形容詞表示不定式的邏輯主語的性質(zhì)或特征時，就用介詞of而不用for引出不定式的邏輯主語，這些形容詞一般有g(shù)ood, nice, kind, wise, silly, stupid, foolish, right, wrong, careless, impolite等，如：It is very kind of you to help him every day.?