1)Yes, I am, No, I am not.
2)Yes, there were. No, there weren't.
3)Yes, he does. No, he doesn't.
4)Yes, it was. No, it wasn't.
5)Yes, it will. No, it won't.
6)Yes, he does. No, he doesn't.
7)Yes, it must. No, it needn't.
8)Yes, I can. No, I can't.
9)Yes, you ought. No, you oughtn't.
10)Yes, I should (or: I would). No, I shouldn't (or: I wouldn't).
11 Yes, he does. No, he doesn't.
12 Yes, I have. No, I haven't.
13 Yes, I am. No, I am not.
14 Shakespeare did.
15 Comrade D. does (or: My friend does; My brother does, etc. ).
16 I shall (or: Comrade D. will; We shall, etc. ) .
17 Two of us have (or: All of us have; None of us have, etc. ).
18This one is (or: My brother's is, etc. ) .
19 I have (or: Comrade A. has; They have; etc. ).