高中英语语法:短暂性动词用于由when,while,as引导的时间状语从句中
时间状语从句由when,while和as引起,主语和从句中各有一个谓语动词,处理这类试题有个规律可遵循:短暂性动词用一般过去时,持续性动词用过去进行时。可理解为:持续时间短的动词动作发生在持续时间较长的动词动作发生的过程中。如:
WhenIwaswaitingforthetrain,Isawastranger.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_________intothehousewhennoone_________.(MET1992)
A.slipped;waslookingB.hadslipped;looked
C.slipped;hadlookedD.wasslipped;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:
Thestudents____________busilywhenMissBrownwenttogetabookshe________intheoffice.(MET1991)
A.hadwritten;leftB.werewriting;hasleft
C.hadwritten;hadleftD.werewriting;hadleft
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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