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 + ... ?

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

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

` - ` Các dấu hiệu nhận biết thường gặp : 

` + ` last night , last week , 5 years ago , 2 years ago , in the past , ....

` 2 ` :
`  ( + ) `  :Lan went to school late last Monday

` ( - ) `  : Lan didn't go to school late last Monday

`( ? ) `  : Did Lan go to school late last Monday ?

` 3 ` :  

`( + ) `  ; Mai bought a new calculator two days ago

` ( - ) ` : Mai did not buy a new calculator two days ago

`(? ) `  : Did Mai buy a new calculator two days ago ?

` 4 ` :

`( + ) ` : Minh watched a funny cartoon last night 

` ( - ) ` : Minh didn't watch a funny cartoon last night

` ( ? ) ` : Did Minh watch a funny cartoon last night ?

`**` Cấu trúc toàn câu  ở thì quá khứ đơn dạng động từ thường 
`(+)` S + Ved/ V2
`(-)` S + did not + Vinf
`(?)` Did + S + Vinf +O?

2.

`**` Dấu hiệu : last Monday.

`(-)` Lan didn't go to school late last Monday.

`(?)` Did Lan go to school late last Monday ?

3.

`**` Dấu hiệu : two days ago

`(+)` Mai bought a new calculator two days ago.

`(?)` Did Mai buy a new calculator two days ago? 

4.

`**` Dấu hiệu : last night

`(+)` Minh watched a funny cartoon last night.

`(-)`Minh didn't watch a funny cartoon last night.