`1.` I played football in the school yard.

Play thêm đuôi ''ed''

`2.` They won the game

Win là động từ BQT `->` won

`3.` My mother went to the market to buy some food

go -> wen   

`4.` He was at home

is -> was/ were. Trong trường hợp này dùng was

`5.` We arrved very carly

arrve -> arrved

`1.` I played football in the school yard

`2.` They won the game

`3.` My mother went to the market to buy some food

`4.` He was at home

`5.` We arrived very early

`=>` Quá khứ đơn

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

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

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

`**` I, she, he, it và N số ít - was | You, we, they và N số nhiều - were

`+` Dạng V thường:

`(+)` S + Ved/V2

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

`(?)` Did + S + V?