1. You have never been to this theatre before.
(a) No,I haven't. I can't buy tickets to this theatre. (b) But I have. I have been to this theatre twice.
2. He has answered all the questions.
(a) Yes, he has. (b) But he hasn't. He has answered only one question.
3. They have called on him several times.
(a) Yes, they have. (b) But they haven't. They have called on him only twice.
4. You've caught a cold.
(a) Yes, I have. (b) But I haven't. I am fine.
5. The film has been on at our local cinema the whole week.
(a) Yes, it has. (b) But it hasn't. The film has been on at out local cinema for a couple of days only.
6. You've made three mistakes in your dictation.
(a) Yes, I have. (b) But I haven't. I've got an excellent mark for my dictation.