例題分析:15.It is politely requested by the hotel management that radios ______ after 11 o'clock at night.
A. were not played B. not be played
C. not to play D. did not play
全句意思是:“旅館管理部門懇請客人晚上11點后不要打開收音機”。句中的謂語動詞request(請求)所引出的從句應(yīng)當用虛擬語氣,即動詞原形或“should+動詞原形”。本句的主語從句中,主語radio是謂語動詞play 的客體,謂語應(yīng)當用被動語態(tài)。所以,答案是C) not be played。在上述這類句子中不能用動詞過去時形式表示虛擬語氣,所以A)不正確。選項B) not to play是動詞帶to的不定式,不能在句中作謂語。選項D)did not play也是動詞play的過去時形式,同樣不能在本句中作為虛擬語氣來使用。而且,它是主動語態(tài)形式,而本題要用被動語態(tài)。
練習:
16). The chairman requested that .
[A]the members studied more carefully the problem
[B]the problem was more carefulnessly studied
[C]with more carefulness the problem could be studied
[D]the members study the problem more carefully
17). The committee recommends that the matter at the next meeting .
[A]would be discussed
[B]will be discussed
[C]be discussed
[D]may be discussed
18). The doctor insisted that his patient .
[A]that he not work too hard for three months
[B]take it easy for three months
[C]taking it easy inside of three months
[D]to take some vacations for three months
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