1) have you been having
2) has been waiting
3) has been
4) 've asked
5) have you tried
6) have you been knowing
7)have you been studying
since, has just finished, has made, has known, for, since, has never made, has looked
1) have you been having
2) has been waiting
3) has been
4) 've asked
5) have you tried
6) have you been knowing
7)have you been studying
since, has just finished, has made, has known, for, since, has never made, has looked