When I was waiting for the train, I saw a stranger. 我在等火车时,看见了一个陌生人。 wait 是持续性动词, see 是短暂性动词。
考例:
Tom _________ into the house when no one _________. (MET 1992)
A. slipped; was looking B. had slipped; looked
C. slipped; had looked D. was slipped; looked
分析:答案为 A . slip 为短暂性动词, look 为持续性动词,可理解为:短暂性动词 slip 的动作发生在持续性动词 look 动作发生的过程中。
类似上面的情形,当 when 作并列连词时,所引起的并列分句的谓语动词总是短暂性的,用一般过去时;而前面分句的谓语动词如果是持续性的,用过去进行时。可理解为:在持续性动词动作发生的过程中,突然发生了短暂性动词的动作。
考例:
The students ____________ busily when Miss Brown went to get a book she ________ in the office. (MET 1991)
A. had written; left B. were writing; has left
C. had written; had left D. were writing; had left
分析:答案为 D . write 为持续性动词,在 write 动词动作发生时,突然发生短暂性动词 go 的动作。
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