1. I [ not hear ] ..didn't hear..... the thunder during the storm last night because I ..was sleeping... [ sleep]

2. it [be] ... was ... beautiful yesterday when we [go] .. went .... for a walk in the park . the sun [ shine ] .... was shining.. the birds ... were singing... [sing]

3. my brother and sister [ talk] ..... were talking..... about something when I [ walk] ..... walked..... into the room

4. tom [go] ..... went..... to his firend's house , but the boys [not be] . weren't..... there.

they [ play] .. were playing..... soccer in the vacant lot down the street

5. the little boy [ fall ] ... fell... asleep while his mother [ read ] ... was reading..... him a story

6. I really [ enjoy ] .... enjoyed..... my holiday last january . while it [ snow ] ... was snowing..... in Iowa , the sun [ shine ] .... was shining... in frolida

7. while ted [ shovel ] ..... was shoveling..... snow from his driveway yesterday , his wife [ bring ] ... brought...... him a cup of hot chocolate

8. john [ have ] ... had..... a car accident last week . he [ drive ] .. was driving...... down the street when sunddenly a lorry [ hit ] ..hit...... his car from behind

9. they [ wait ] ... were waiting..... for me when I [ arrive ] ..... arrived... at the station

1 didn't hear -> thì QKĐ 

was sleeping -> thì QKTD

2  was - went thì QKĐ 

was shinning - were singing -> thì QKTD 

3 were walking -> thì QKTD 

walked -> thì QKĐ

4 went - weren't thì QKĐ

were playing -> thì QKTD

5 fell -> thì QKĐ 

was reading -> thì QKTD 

6 enjoyed -> thì QKĐ 

was snowing - was shinning -> thì QKTD 

7 was shovelling -> thì QKTD 

brought -> thì QKĐ

8 had -> thì QKĐ 

was driving -> thì QKTD 

hit -> thì QKĐ

9 were waitting -> thì QKTD

arrived -> thì QKĐ