做题时常见错误如下：
　　一、易把be＋现在分词记成be＋过去分词
　　例：He was talked （talk） to his mum at that time．
　　答案：was talking
　　解析：过去进行时与现在进行时结构上的区别体现在be动词上。
　　二、丢掉be动词或忘记把动词变成现在分词
　　例：1 I watching （watch） TV when he came in．
　　2 They were play （play） games at 5：00 p．m． yesterday．
　　答案：1 was watching　 2 were playing
　　解析：现在进行时中“be＋现在分词，缺一不可”的规律也可应用于过去进行时。
　　三、对动词或动词词组提问时丢掉doing
　　例：We were flying kites at 5：00 p．m． yesterday． （对划线部分提问）
　　What were you at 5：00 p．m． yesterday?
　　答案：What were you doing at 5：00 p．m． yesterday?
　　解析：现在进行时中“What……doing……”?句式同样适用于过去进行时。
　　四、易与现在进行时弄混
　　例：My mother is cooking （cook）when I got home．
　　答案：was cooking
　　解析：这两种时态的共同点是都表示动作正在进行，但现在进行时前提是现在，而过去进行时前提是过去，由when I got home可看出前提是过去。
　　五、易与一般过去时弄混
　　例：昨晚我在读一本故事书。
　　I read （read） a story book yesterday evening．
　　答案：was reading
　　解析：这两种时态的共同点是都用于表示过去发生的动作。但过去进行时强调动作正在进行，而一般过去时则表示过去某一时间所发生的动作或存在的状态，它表示的动作往往已经完成。“在”说明正在进行，而“I read a story book yesterday evening．”的意思是昨晚我读了一本故事书，言下之意已经读完了。故用过去进行时。
　　另外，在宾语从句中当主句为过去时，从句若是现在进行时，需变成过去进行时。
　　e．g． He said that he was drawing a cat at noon yesterday．

一．　填入以下单词的正确形式。
1． It was warm,so I _______(take) off my coat.
2． Jane ___________(wait) for me when I ______(arrive).
3． Sue wasn’t hungry, so she _________(eat) anything.
4． My brother came into the bedroom while I _________(dance).
5． _______ he ________(lie) on the ground at nine yesterday evening ?
6． What _____ Jim __________(write) when the teacher came in ?
7． Mike and I ________(play) baskteball at that time yesterday afternoon.
8． My brother ______(fall) while he _______(ride) his bicycle and hurt himself.
9． I first met Lisa three years ago. She ______(work) at a radio shop at the time.
10.When I arrived at his office , he ______ on the phone.(speak)
二.按要求进行句型转换。
1. We were having a PE class at four yesterday afternoon.(改为否定句)
We _______ ________ a PE class at four yesterday afternoon.
2. Kate was reviewing her lessons at eight last night.
(改为一般疑问句，做肯，否回答，对划线部分提问)
3. He ran in the park .(用at this time yesterday改写)
4. They were playing computer games at nine last night.( 对划线部分提问)
5. I was reading a novel at three yesterday afternoon.( 对划线部分提问)
三.根据汉语提示完成句子。
1． 他们那时不在打排球。
They _______ _______ volleyball at that time.
2． 当你回来时，他在看电视吗？
_______ he _______ Tv when you came back?
3． 昨天中午他在哪里等你？
_______ _______ he _______ for you at noon yesterday ?
4． 当我离开时，他正在做家庭作业。
He ________ ________ his homework when I left.
5． 正当他们扫地的时候，老师进来了。
While they_______ _______ the floor , the teacher came in.　
四、单选
　　1 What ______ from three to four yesterday afternoon?
　A have you done　 B had you done　
　　C did you do　D were you doing
　　2 – I call you yesterday evening， but there was no answer．
　　－ Oh．， I’m sorry I _____ dinner at my friend’s home．
　　A home　B had　C was having　D have had
　　3 My mother _____ while my father _____TV．
　　A cooked； was watching　 B was cooking； was watching
　　C was cooked； watched　 D cooked； watched
　　4 When I got home， my son _____ the music．
　　　A am listening to　 B listened to
　　　C was listening to　D was listening
　　5 We heard a cry when we ______ TV last night．
　　A were watching　B would watch　 C watch　 D watched
　　6 She asked him whether he _____ back for lunch．
　　A come　B was coming　C came　D had come
　　7 Could you tell me when ______?
　　A she is coming　 B she was coming　 C will be come　 D is he coming
　　8 The teacher ______ when I came into the classroom．
　　A is drawing　 B draws　 C has drawn　 D was drawing
　　9 The pizza ______ by my mother． Would you like to have some?
　　A makes　B was making　 C made　 D was made
　　10 Nobody noticed what she ______ at the moment．
　　A will do　 B was doing　 C has done　 D had done
　　11 Was it raining hard when you _____ this morning?
　　A left　B leaves　C was leaving　D would leave
　　　五、填空
　　1 ______ they______ （feed） the animals at 5：00 yesterday afternoon?
　　2 Mrs．Green _____　_____ （not wash） clothes at this time yesterday．
　　3 Grandpa ______　______ （mend） his clock when I reached home．
　　4 As I _____ （walk） in the park， I saw some children playing games．

参考答案：　参考答案四：1 D　 2 C　 3 B　 4 C　 5 A　　6 B　 7 A　 8 D　9 D　 10 B　 11 A
　　　
　参考答案四：1 D　 2 C　 3 B　 4 C　 5 A　　6 B　 7 A　 8 D　9 D　 10 B　 11 A
　　　五1 were feeding　 2 wasn’t washing　　3 was mending　 4 was walking