6. The light went out while I (have) _____________ dinner.
7. He (do) _____________ nothing before he (see) _____________ me.
8. When they (get) _____________ the station, the train (leave) _____________.
9. The house (catch) _____________ fire while they were sleeping.
10. While Tom was reading, Amely (watch) _____________ a documentary on TV.
11. The burglar (open) _____________ the safe when he (hear) _____________ footsteps. He
immediately (put) _____________ out his torch and (crawl) _____________ under the bed.
12. Last night I (drop) _____________ a plate when I (do) _____________ the washing-up.
Fortunately it (not/break) _____________.
13. Mary and I (dance) _____________ the house when the telephone rang.
14. I (open) _____________ the letter when the wind (blow) _____________ it out of my hand.
15. The boy fell and hurt himself while he (ride) _____________ a bicycle

`6` was having

`7` had done `-` saw

`8` got `-` had left

`9` catched

`10` was watching

`11` was opening `-` heard `-` put `-` crawled

`12` dropped `-` was doing `-` didn't break

`13` were dancing

`14` was opening `-` blew

`15` was riding

`---------------`

`***` Quá khứ đơn

`-` Với tobe

`(+)` S + was/were

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

`(?)` (Wh) + Was/Were + S?

`-` He, she, it, N số ít + was

`-` You, we, they, N số nhiều + were

`-` I + was trong câu khẳng định và phủ định, + were trong câu nghi vấn

`-` Với động từ thường

`(+)` S + V2/ed

`(-)` S + didn't + V

`(?)` (Wh) + Did + S + V?

`->` DHNB: yesterday, this morning, in the past, last + mốc thời gian, khoảng thời gian + ago, in + năm trong quá khứ,...  

`***` Quá khứ hoàn thành

`(+)` S + had + V3/ed

`(-)` S + hadn't + V3/ed

`(?)` (Wh) + Had + S + V3/ed?

`***` Kết hợp QKĐ và QKHT

`-` When QKĐ, QKHT

`-` After QKHT, QKĐ

`-` Before QKĐ, QKHT

`-` By the time QKĐ, QKHT

`->` Một hành động xảy ra trước hoặc sau hành động khác trong quá khứ.

 `***` Quá khứ tiếp diễn

`(+)` S + was/were + Ving

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

`(?)` (Wh) + Was/Were + S + Ving?

`->` DHNB: at this time + thời gian trong quá khứ, at + giờ + thời gian trong quá khứ,.....

`***` Kết hợp QKĐ và QKTD

`-` When QKĐ, QKTD

`-` When QKTD, QKĐ

`-` While QKTD, QKĐ

`=>` Diễn tả một hành động đang diễn ra trong quá khứ thì bị hành động khác xen vào.

`***` While + QKTD, QKTD: Diễn tả hai hành động cùng xảy ra tại một thời điểm ở quá khứ.