1.have we been waiting for you since 12 o’clock? yes, we have. no, we have not.
2. has he been working here for 2 hours? yes, he has. No, he has not.
3. have they been sleeping for a long time? yes, they have. no, they have not.
4. Have i been waiting here since three o’clock? yes, i have. no, i have not.
5. has that noise been going on since they came home? yes, it has. no, it has not.
6. has the telephone been ringing for five minutes? yes, it has. no, it has not.
7. has he been coming here day after day for years? yes, he has. no, he has not
