`bbb{Answer}:`

`1.` have they lived - have lived

`2.` have known

`3.` has learned

`4.` has just passed

`5.` has already told

`6.` Has she eaten

`7.` have watched

`8.` has never seen

`9.` haven't stayed

`10.` has discussed

`11.` hasn't had

`12.` has studied

`13.` haven't seen

`14.` have been

`15.` have had

`===============`

`1`. have they lived/ have lived 

`2`. have known 

`3`. has learnt

`4`. has just passed 

`5`. had already told

`6`. Has she eaten

`7`. have watched

`8`. has never seen

`9`. haven't stayed

`10`. have discussed

`11`. hasn't had 

`12`. has studied 

`13`. have not seen/ haven't seen

`14`. have been

`15`. have had

Cấu trúc thì `HTHT` :

`(+)` `S` `+` have/ has `+` V3/-ed

`( - )` `S` `+` haven't / hasn't `+` V3/-ed

`( ? )` ( Wh-) `+` have/has `+` `S` `+` V3/-ed........?