1. was always talking ("always" với các thì tiếp diễn để diễn tả sự phàn nàn)
2. met - walking (QKĐ + while + QKTD)
3. was reading - heard (QKTD + when + QKĐ)
4. came - was having (QKĐ + while + QKTD)
5. Were you watching - phoned (QKTD + while + QKĐ)
6. was listening - was playing (QKTD + as + QKTD)
7. was singing - was jumping (While QKTD, QKTD)
8. cleaned - were sleeping (QKD + when + QKTD)
9. were you always going ("always" với các thì tiếp diễn để diễn tả sự phàn nàn)
10. came - switched (2 hành động xảy ra liên tiếp nhau dùng QKĐ)
11. was reading - was playing (QKTD + while + QKTD)
Alan chúc bạn học tốt!

QKTD -S+was-were+V_ing

QKĐG-S+was-were+..

            S+V_ed-P(I)

Nga (always / talk) was always talking on the phone, which made her parents very angry.

diễn tả sự phàn nàn-QKTD

I (meet) met an old friend while I (walk) was walking along the street.QKTD

Last night I (read) was reading book when suddenly I (hear) heard a shout.

QKTD_QKDG

The postman (come) came while I (have) was having lunch.QKTD

(you / watch) Were you watching TV when I (phone) phoned you?QKTD

I (listen) was listening to music as my little sister (play) was playing with her doll.

While the singer (sing) was singing, the crowd (jump) was jumping.

I (clean) cleaned the house when you (sleep) were sleeping.

Why (you / always / go) were you always going to school late?

She (come) came home, (switch) switches on the computer and (check) checked her e-mails.

I (read) was reading the newspaper while David (play) was playing video game.