`2.` I don't need a football because I bought one yesterday

`3.` I know a lot about Paris because I went there two years ago

`4.` I don't need to worry about my homework because I finished it last night

`5.` I haven't got a PlayStation anymore because I sold it in June

`6.` Mum is angry with me because I broke the window a week ago

`***` `DHNB:` yesterday, two years ago, last night, a week ago,...

`giahan27511`

`2,` I don't need a football because I bought one yesterday

`->` yesterday `->` QKĐ

`3,` I know a lot about Paris because I went there two years ago

`->` two years ago `->` QKĐ

`4,` I don't need to worry about my homework because I finished it last night

`->` last night `->` QKĐ

`5,` I haven't got a PlayStation anymore because I sold it in June

`->` in June `->` QKĐ

`6,` Mum is angry with me because I broke the window a week ago

`->` a week ago `->` QKĐ

___________________________________

`@` QKĐ

`(+)` S + V2/ed ...

`(-)` S + didn't + Vbare-inf ...

`(?)` Did + S + Vbare-inf ... ?