1. When I arrived (arrive) at the house, he still (sleep) was sleeping
2. The light went (go) out while we were having (have) dinner.
3. Bill was having (have) breakfast when I stopped (stop) at this house this morning.
4. As we were crossing (cross) the street, we saw(see) an accident.
5. Tom saw (see) a serious accident while he was standing (stand) at the bus stop.
6. While my father was reading (read) a newspaper, I was learning (learn) my lesson and my sister (do) her homework.
7. The children were playing (play) football when their mother came (come) back home.
8. The bell rang ( ring) while Tom was taing (take) a bath.
9. I was (be) very tired because I was working (work) all day yesterday.
10. He was sitting (sit) in a cafe when i saw(see) him.

Arrived/was still sleeping
Was going/were having
was having/stopped
were crossing/saw
saw/was standing
was reading/was learning/ was doing
Were playing/came
rang/was taking
was/was working
was sitting/saw

1/When I (arrive) arrived at the house, he still (sleep) was sleeping.
( Khi tôi đến nhà, anh vẫn đang ngủ.)
2/ The light (go)went out while we (have)were having dinner.
(Ánh sáng tắt trong khi chúng tôi đang ăn tối.)
3/ Bill (have)was having breakfast when I (stop) stopped at this house this morning.
(Bill đang ăn sáng khi tôi dừng lại ở ngôi nhà này sáng nay.)
4/ As we (cross)was crossing the street, we (see)saw an accident.
(Khi chúng tôi băng qua đường, chúng tôi thấy một tai nạn.)
5/ Tom (see) saw a serious accident while he (stand) was standing at the bus stop.
(Tom thấy một tai nạn nghiêm trọng khi anh đang đứng ở trạm xe buýt.)
6/ While my father (read) was reading a newspaper, I (learn) learned my lesson and my sister (do) did her homework.
(Trong khi cha tôi đang đọc báo, tôi đã học được bài học của mình và chị tôi đã làm bài tập về nhà.)
7/ The children (play) were playing football when their mother (come) came back home.
(Những đứa trẻ đang chơi bóng đá khi mẹ chúng trở về nhà.)
8/ The bell ( ring) rang while Tom (take) was taking a bath.
(Chuông reo trong khi Tom đang tắm.)
9/ I (be) was being very tired because I (work) worked all day yesterday.
(Tôi đã rất mệt mỏi vì tôi làm việc cả ngày hôm qua.)
10/ He (sit)was sitting in a cafe when i (see) saw him.
(Anh ấy đang ngồi trong quán cà phê thì tôi thấy anh ấy.)