内容正文:
单元语法小专题(Grammar Focus)
语法精讲
一、过去进行时
1.含义及构成
过去进行时表示过去某一时刻或某一段时间正在进行或发生的动作,其结构为:was/were+doing。
2.用法:
①表示过去某一段时间内正在进行的动作。
e.g.We were having classes all that day.那天我们整天都在上课。
②表示过去某一时刻正在进行或发生的动作。与过去某一特定的时间状语连用,常见的有:at 3 o'clock yesterday afternoon,at this time yesterday等。
③表示过去一个动作发生时,另一个动作正在进行,持续时间长的动作用过去进行时,常用在while引导的时间状语从句中。
二、when与while在引导从句时的区别
1.用when引导的状语从句表示时间,说明一个动作发生时,另一个动作正在进行,也可表示正在进行某一个动作时,另一个动作发生了。
e.g.The students were drawing pictures when the teacher came in.当老师进来时,学生们正在画画。
2.用while引导的从句一般用过去进行时,表示正在进行某个动作时,发生了另一个动作,这时主句用一般过去时。
e.g.While he was reading,the telephone rang.当他正在看书时,电话铃响了。
三、过去进行时与一般过去时的区别
过去进行时强调某一动作是在过去某时正在进行,一般用到的动词是表示具体行动,动作可延续,同时用到的时间状语表示的范围要小且具体。而一般过去时对谓语动词没有什么限制,用到的时间状语范围不受限制,一般过去时着重表示在过去做过,基本上是一个结束了的动作。表过去状态、抽象、不表具体动作行为的动词不用过去进行时,但可以用一般过去时。
e.g.Mr.Green was mending his daughter's bike this morning.(强调动作正在进行)
Mr.Green mended his daughter's bike this morning.(表示动作做过,并结束了)
语法专练
一、用所给单词的适当形式填空。
1.Mother __was_sweeping__(sweep) the floor when I __left__(leave) home.
2.When the visitors __came__(come),the students __were_having__(have) an art class.
3.John __was_driving__(drive) home when it __rained__(rain) last night.
4.Her father __was_sleeping__(sleep) at that time.
5.Molly __was_helping__(help) her mom clean the house at three yesterday afternoon.
二、单项选择。
(B)6.—I saw Mr.Smith in the office at ten yesterday morning.
—That's impossible.He ________ an English party with us then.
A.has B.was having
C.had D.has had[来源:学科网ZXXK]
(B)7.(2018·毕节模拟)—I shouted to you at the gate,but you didn't hear me.
—Really?I ________ a telephone call to my mother.
A.make B.was making
C.made D.am making
(C)8.(2018·贵阳模拟)—What were you doing when I phoned you yesterday evening?[来源:学科网ZXXK]
—I was doing my homework while my parents ________ dinner,grandma.
A.cooked B.cook C.were cooking
(C)9.—Lucy,what were you doing at nine last night?
—I ________ the piano.I usually practice the piano at that time.
A.play B.played
C.was pla