`text{6. has taken}`
`text{7. have finished}`
`text{8. have - eaten}`
`text{9. hasn't came}`
`text{10. have worked}`
`text{11. have you known}`
`text{12. haven't done}`
`text{13. have seen - has - done}`
`text{14. have gone}`
`text{15. has been}`
`text{16. hasn't had}`
`text{17. hasn't played}`
`text{18. haven't had}`
`text{19. haven't seen}`
`text{20. has lived}`
`text{công thức:}`
`text{(+) S + has/ have + V3/ed}`
`text{(-) S + hasn't/ haven't + V3/ed}`
`text{(?) has/ have + S + V3/ed}`
