Cấu trúc thì quá khứ đơn 

Với động từ thường :

` ( + ) ` : S + V-ed / V2

` ( - ) ` : S + didn't + V nguyên mẫu

` ( ? ) ` : Did + S + V nguyên mẫu ?

Với tobe

` ( + ) ` : S + was / were + ...

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

` ( ? ) ` : Was /Were + S + ...

` + `  Chủ ngữ là I / he / she / it + was + ( not ) + ...

` + `  Chủ ngữ là you / we / they + were + ( not ) + ...

` 1 ` : He sent a letter to his penpal last week

` ( - ) ` : He didn't send a letter to his penpal last week

` ( ? ) `  : Did he send a letter to his penpal last week ?

` -> `  Yes he did / No he didn't

` 2.` She taught us English last year

` ( - ) ` : She didn't teach us English last year

` ( ? ) `  : Did she teach us English last year ?

` -> ` Yes she did / No she didn't

` 3. ` They did their homework carefully.

` ( - ) ` : They didn't do their homework carefully

` ( ? ) `  : Did they do their homework carefully ?

` -> ` Yes they did / No they didn't

` 4. ` The Robinsons bought a lot of souvenirs.

` ( - ) ` : The Robinson didn't buy a lot of souvenirs.

` ( ? ) `  : Did The Robinson buy a lot of souvenirs ?

` -> ` Yes they did / No they didn't

` 5.` Tourists ate seafood at that famous restaurant.

` ( - ) ` : Tourists didn't eat seafood at that famous restaurant

` ( ? ) `  : Did Tourists eat seafood at that famous restaurant ?

` -> ` Yes they did / No they didn't

` 6.` The teacher gave her students a lot of homework

` ( - ) ` : The teacher didn't give her students a lot of homework

` ( ? ) `  : Did the teacher give her students a lot of homework ?

` -> ` Yes she did / No she didn't

` 7.` His uncle took him to se Cham temple.

` ( - ) ` : His uncle didn't take him to se Cham temple

` ( ? ) `  : Did His uncle take him to se Cham temple ?

` -> ` Yes he did / No he didn't

` 8. ` Liz bought a lot of souvenirs.

` ( - ) ` : Liz didn't buy a lot of souvenirs

` ( ? ) `  : Did Liz buy a lot of souvenirs ?

` -> `Yes she did / No she didn't

` 9. ` They put the fish in a big bag.

` ( - ) ` : They didn't put the fish in a big bag

` ( ? ) `  : Did they put the fish in a big bag ?

` -> ` Yes they did / No they didn't

` 10. ` Ba wore the cap with a dolphin on it.

` ( - ) ` : Ba didn't wear the cap with a dolphin on it

` ( ? ) `  : Did Ba wear the cap with a dolphin on it ?

` -> ` Yes he did / No he didn't