八下 unit 5 语法专练
When 和while
when 既可以表示时间点，也可以表示时间段，从句中谓语动词可以是延续性动词，也可以是瞬间动词。
while 只表示某个时间段，从句谓语动词必须用延续性动词，且多用于进行时态。强调主句与从句的动作同时发生或主句的动作发生在从句的动作过程中。
My brother fell while he was riding his bicycle. 我哥哥骑自行车的时候从车上摔了下来。
It was raining when they left the station. 他们离开车站的时候天正在下雨。
They left the station while it was raining. 天正在下雨的时候他们离开了车站。
When I got to the top of the mountain, the sun was shining. 当我到达山顶的时候，阳光灿烂。
达标检测
when 与while 专题练习：
（ ）1. When I got there, he ________ them to dance.
A. is teaching B. teaches C. taught D. was teaching
（ ）2. We were reading the newspaper _______ suddenly the light went out (熄灭).
A. when B. while C. as D. /
（ ）3. Newton was playing under an apple tree _________ an apple fell onto his head.
A. after B. before C. when D. while
（ ）4. What ______ when the earthquake happened on May 12th.
A. are you doing B. were you doing C. do you do D. did you do
（ ）5. My brother ______ while he _____ his bicycle and hurt himself.
A. fell , was riding B. fell, rode C. is falling, rode D.had fallen, was riding
（ ）6. Mary was dancing while Mike _____ the piano.
A. played B. was playing C. were playing D. plays
（ ）7. All the students were sweeping the floor __ they heard a man _________ “help”.
A. when, shouting B. while , to shout C. when , to shout D. while , shouting
（ ）8. While I ______ my breakfast , the postman came and brought me the newspaper.
A. is having B. was having C. has had D.had
（ ）9. He was just falling asleep _______ there was a loud knock at the door.
A. when B. while C. as D. and
（ ）10. When my father came back, my mother _______ in the kitchen.
A.cooks B. cooked C. is cooking D. was cooking
用when和while填空。
1.Mary was having dinner _______ I saw her .
2.The weather was fine ______ we were in Beijing .
3.Don’t talk so loudly ______ others are working .
4. I was walking in the street ________ I saw the accident happen.
5.He was listening to music ______ he was riding his bike .
6.I was waiting at the lights ______ I saw the boy fall off his bike .
7.I was walking in the street ______ an accident happened .
8.The driver was talking on his mobile phone ______ he was driving .
过去进行时
1. 定义
过去进行时，是表示过去某个具体时刻正在进行的事情或动作。
结构：be (过去式）+ 动词-ing
过去进行时可以表示在过去某个时间点发生的事情。时间点可以用介词短语、副词或从句来表示。常用的时间状语：this morning，the whole morning，all day yesterday，from nine to ten last evening。
用所给动词的正确形式填空。
1. —What_____ you_____(do) when he arrived —I ___________(watch) TV at that time.
2. When I___________ (walk) in the street, I__________ (meet) my best friend Jim.
3. Mom_________ (buy) my father a nice coat and a pair of trousers last Sunday.
4. While my parents were doing some cleaning, my sister_________ (shout) to me loudly.
5. When he saw the thief steeling things in the office, he closed the door and ________ (call) the police.
6. I first met my girl friend two years ago, she__________ (work) in the supermarket.
7. Thank you for_________ (teach) us so well, my dear teacher.
8. What________ your parents_________ (do) at nine o’clock last nig
9. Betty _____________(watch) TV last night.
10.The Shuttles usually _____________ (have) supper at 6:30 .
11.The boys _____________ (play) football on the playground now.
12.Lucy _____________ (leave) the classroom half an hour ago.
13.It _____________ (snow) heavily when they left the station.
14._____________ she _____________ (fall) off the tree just now
15.It _____________ (rain) almost every day last month.
16.---where _____________ you _____________ (catch) the fish
---I _____________ (catch) it in the river near the house.
17.She _____________ (write) a letter to her friend last night. But I don't know whether she has finished it or not.
用动词的正确形式填空（请思考学会各种时态的分辨 )
1.It _______________ ( rain ) when I went out yesterday.
2.My father __________(play) a basketball match at nine last night.
3. They ______________ (practise ) singing at that time
4. While he _____________ ( read ) , he _________ ( listen ) to the music yesterday.
5. The engineers ___________ （test）the new machine when the electricity ___________ （go）off.
6. While Mum ___________ （put）Kevin to bed, the doorbell ___________ （ring）.
7. She and I _______ （take）a walk together every evening.
8. Su Hai and Su Yang _________(have) eight lessons this term.
9.My aunt is a writer. She _______ (write)more than ten books since 2000.
10.My pen pal said he would write to me, but I _______ (receive)any letters from him so far.
11. There (be)a meeting tomorrow afternoon.
12.Before he (leave), Xian became the schools best student and won several prizes for his talents.
13. Too much care spoils their fun when they . (grow up)
14. She promised to help him and _________ (give)him three golden apples.
15.A new road _________(build) near my school next year.

郑重声明：本文版权归原作者所有，转载文章仅为传播更多信息之目的，如作者信息标记有误，请第一时间联系我们修改或删除，多谢。