Đáp án:

1. I (switch off) switched off the computer because it (make) was making a strange noise.   

2. My dad (listen) was listening to classical music when I (arrive) arrived home from school.
3.  We (play) were playing video games when - my mum (say) said 'Turn the volume down!'
4. My cousin (meet) met his wife, Bianca, while he Italy. (live) was living in
5. My little sister(draw) drew a picture while I   (study) was studying for my French exam.
 6. While they(try) were trying to fix the computer, all the lights went out

7. When we (leave) left school yesterday, it  (rain)was pouring with rain

8. When you (see) saw Paul, (he wear) was wearing a black jacket? 

9. I (try)was trying to log on when the Wifi stopped working
10 while Dad was printing (print) an article, the printer ran out (run out) of paper

1. switched off - was making

2. was listening - arrived

3. were playing - said

4. met - was living

5. was drawing - was studying

6. were trying - went out

7. left - was pouring

8. saw - Was he wearing

9. was trying - stopped

10. was printing - ran out

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Hành động đang xảy ra thì có hành động khác cắt ngang

+ Hành động đang xảy ra `->` QKTD: S + was/were + Ving

+ Hành động cắt ngang `->` QKD: S + V2/ed

`-` Thì QKD:

(+) S + V2/ed

(-) S + did + not + V-inf

(?) Did + S + V-inf?

`-` Thì QKTD:

(+) S + was/were + Ving

(-) S + was/were + not + Ving

(?) Was/Were + S + Ving?