chia động từ                                         

`1.` have never seen

`2.` arrived

`3.` have known

`4.` has written

`5.` haven't had `-` was

`6.` have changed`-`started `-` only had `-` have expanded

`7.` told `-` warndered `-` was

`8.` missed`-` have been

`9.` has never seen

`10`dreamed `-` had never see

`@`thì HTHT

`+)`S + have/ has + VpII

`-)`S + have/ has + not + VpII 

`?)`Have/ Has + S + VpII +… ?

`->``->` DHNB:Before: trước đây:Ever, Never,For + quãng thời gian,Since + mốc thời gian,Yet,Just ,Recently  , Lately,Already,So far,Until now,Up to now ,Up to the present,...

`@` thì QKĐ với V thường

`+)` S `+` Ved/2

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

`?)` Did `+` S `+` V

`->` DHNB: yesterday, last night, ago,...

$#AP$

1. Have never seen

2. Arrived

3. Have known

4. Has written

5. Haven't had was

6. Have changed, started, only had have expanded

7. Told warndered was

8. Missed have been

9. Has never seen

10. Dreamed had never seen