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
I'll tell you about my worst weekend ever. It was the summer of 2010. My sister and I went to see my grandmother. Everything was fine. My sister spoke impolitely to my grandmother. Grandma wasn't feeling well, but she didn't tell us. Her illness was not noticeable. We stayed there for 2 weeks. I played on my phone and my sister went out with new friends. When we left, I saw my grandmother crying. I was so sorry to leave her.
After 3 weeks, my family and I found out that she was ill. She fainted in the store and was taken to the hospital. She was told that she had been seriously ill for at least 7 weeks. I remembered what she looked like when I was with her, but I didn't even think about it.