Cấu trúc Thì QKĐ :

`-` ĐT Tobe :

`+` CKĐ : S + was / were + adj / n

`+` CPĐ : S + wasn't / weren't + adj / n

`+` CNV : Was / Were + S + adj / n ?

`-` ĐT Thường :

`+` CKĐ : S + Ved / V2

`+` CPĐ : S + didn't + V

`+` CNV : Did + S + V ?

`1`.stayed

`2`.went

`3`.had

`4`.was

`5`.visited

`6`.were

`7`.bought

`8`.saw

`\text{@ TheFox}`

Ta có cấu trúc thì quá khứ đơn với động từ 

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

` ( - ) ` : S + didn't + V nguyên mẫu

` ( ? ) ` : Did + S + V nguyên mẫu ?

Ta có cấu trúc thì quá khứ đơn với tobe

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

` ( - ) ` : S + wasn't / weren't + ...

`( ? ) `: Was / Were + S + V nguyên mẫu ?

` - ` Các dấu hiệu nhận biết thường gặp :

` + ` last night , last month , last year , yesterday , a long time ago ,...

` 1 `: stayed

` 2 `: went

` - `  Dấu hiệu nhận biết : last night 

` 3 ` : had

` - `  Dấu hiệu nhận biết : last year

` 4 ` : was

` 5 ` : visited

` - `  Dấu hiệu nhận biết : last summer

` 6 `  : were

` 7  : bought

`8 `: saw