`8.` have lost

`9.` have bought

`10.` have reserved 

`11.` have learned

`12.` has played

`13.` hasn't rained

`14.` haven't seen

`15.` have studied

`-` Cấu trúc thì Hiện Tại Hoàn Thành:

`(+)` S + have/ has + VpII

`(-)` S + have/ has + not + VpII

`(?)` Have/ has + S + VpII..?

`-` Dấu hiệu nhận biết: for, since, yet, already,..

`-` He/ She/ It/ N số ít.. + has

`-` I/ We/ You/ They/ N số ít.. + have

Cấu trúc thì hiện tại hoàn thành : 

` ( + ) ` : S + have / has + V3 

` ( - ) `: S + haven't / hasn't + V3 

` ( ? ) ` : Have / Has + S + V3 ? 

` + ` I / you / we / they / chủ ngữ số nhiều + have / haven't + V3 

` + ` He / she / it / chủ ngữ số ít + has / hasn't + V3 

- Dấu hiệu thường gặp : Just , already , yet , many times , since , for , ... 

` 8 ` . have lost 

` 9 ` . has bought 

` 10 ` . have reserved 

` 11 `  . have learnt 

` 12 `  . has played 

` 13 `  . hasn't rained 

` 14 `  . haven't seen 

` 15 `  . have studied