`+`áp dụng công thức thì hiện tại hoàn thành 

`+` he, she, it , danh từ số ít, danh từ không đếm được + has + VpII (V3)

`+` they , we , you , i , danh từ số nhiều + have + VpII (V3 )

`DHNVB`: yet , since 1970 , for three times , many times , just ,ever ,  since 1995 , already 

`21`. have lived

`22`. has studied

`23`. have came

`24`.has already read

`25`. has just wated

`26`.have ever seen

`27`.have ever talked

`28`. has he had

`->`Have/ has + S + V3?

`29`.haven't seen

`30` . has worked