专题归类复习二。
过去进行时。
语法讲解。
1．构成： was/were＋doing
2．用法： 过去进行时主要表示过去某一时间或某一段时间正在进行的动作。如：
his father fell and hurt himself while he was riding his bicycle.他爸爸骑自行车时摔了下来，受伤了。
3．常用时间状语： this morning, the whole morning, all day, yesterday, from nine to ten, last morning, when, while等。
4．when与while的区别。
1)引导时间状语从句时，while连接的是时间段，而when连接的多是时间点。如：
what was your father doing while your mother was cooking？你妈妈做饭时，你爸爸在干什么呢？
what was your mother doing when you came back?
当你回来时，你妈妈在干什么呢？
2)while 可以连接两个并列的句子，而when不可以。如：
i was trying my best to finish my homework while my sister was watching tv.我当时正在尽力完成作业，而我妹妹正在看电视。
3)when是特殊疑问词，可以对时间进行提问，而while不能。如：
when were you born?你什么时候出生的？
语法精练。
.单项选择。
) when i rang you up
yesterday?
a．are; doing b．were; doing
c．do; dod．h**e; done
)2.—i called you at 8 o'clock yesterday evening,
but there was no answer.
—oh, i'm __dinner at my friend's
home.a．h**eb．had
c．was h**ing d．h**e had
) gao___by the doctor when her students
came to see her last sunday.
a．looks over
b．being looked over
c．look over
d．was being looked over
)4. my sister was doing the dishes __my
brother was sweeping the floor.
a．whenb．while
c．which d．though
) at ten last night.
a．was watching b．were watching
c．watched d．watch
) noticed what the young man___at that
moment.
a．will do b．was doing
c．has done d．had done
)7.—were you at home at 7 o'clock last night?
—yes, i___a shower at that time.
a．tookb．was taking
c．was taken d．are taking
) tiger when the teacher came in.
a．are drawing b．drawing
c．were drawing d．drew
.用所给单词的适当形式填空。
1．my sonplay)with the dog when i was
in the living room.
2．mr. wang with her daughterh**e)
breakfast when someone knocked at the door.
3．when i got home yesterday afternoon, it
rain) hard.
4．—why did the policeman stop your car?
—because imake) a call at that
moment. what a bad day!
5．jimh**e)his supper at this time
yesterday; henot read)a book.
6．webuild)a new house at that time.
7．he___meet)his old friend while
hestudy) in america.
8．wemend)tv at ten last night.
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