1
a Yes, I/we can; No, I/we cannot/can't b Yes, I/we can; No, I/we cannot/can't c Yes, she can; No, she cannot/can't d Yes, they can; No, they cannot/can't e Yes, he can; No he cannot/can't
2
a Yes, they have; No, they have not/haven't b Yes, she has; No, she has not/hasn't c Yes, it has; No, it has not/hasn't d Yes, I/we have; No, I/we have not/haven't e Yes, we/you have; No, we/you have not/haven't
3
a Yes, you are; No, you are not/you aren't/you're not b Yes, there is; No, there is not/there isn't/there's not c Yes, there are; No, there are not/aren't d Yes, he is; No, he is not/he isn't/he's not e Yes, I am; No, I am not/I'm not
4
a Yes, I/we do; No, I/we do not/don't b Yes, they do; No, they do not/don't c Yes, I/we do; No, I/we do not/don't d Yes, they do; No, they do not/don't e Yes, you do; No, you do not/don't
5
a Yes, she does; No, she does not/doesn't b Yes, she does; No, she does not/doesn't c Yes, it does; No, it does not/doesn't d Yes, he does; No, he does not/doesn't e Yes, he does; No, he does not/ doesn't
6
a Yes, I/we can; No, I/we cannot/can't b Yes, I/we do; No, I/we don't c Yes, I/we have; No, I/we have not/haven't d Yes, I/we have; No, I/we have not/haven't e Yes, they do; No, they do not/ don't f Yes, there is; No, there is not/there isn't/there's not g Yes, there are; No, there are not/aren't h Yes, there is; No, there is not/there isn't/there's not i Yes, I/we do; No, I/we do not/ don't j Yes, she does; No, she does not/doesn't k Yes, you/we do; No, you/we do not/don't l Yes, I/we do; No, I/we do not/don't m Yes, it does; No, it does not/doesn't n Yes, he does; No, he does not/doesn't o Yes, I/we do; No, I/we do not/don't p Yes, they do; No, they do not/don't q Yes, I/we do; No, I/we do not/don't r Yes, she does; No, she does not/doesn't s Yes, there are; No, there are not/aren't t Yes, they can; No, they cannot/can't u Yes, it is; No, it is not/it isn't/it's not v Yes, I/we do; No, I/we do not/don't w Yes, he has; No, he has not/hasn't x Yes, they are; No, they are not/they aren't/they're not y Yes, he has; No, he has not/hasn't z Yes, it is; No, it is not/it isn't/it's not
7
a Yes, I/we did; No, I/we did not/didn't b Yes, they did; No, they did not/didn't c Yes, she did; No, she did not/didn't d Yes, it did; No, it did not/didn't e Yes, we/you did; No, we/you did not/ didn't
8
a Yes, there were; No, there were not/weren't b Yes, it was; No, it was not/wasn't c Yes, she was; No, she was not/wasn't d Yes, it was; No, it wasn't e Yes, I was/Yes, we were; No, I was not/ wasn't/No, we were not/weren't
9
a Yes, she has; No, she has not/hasn't b Yes, I/we have; No, I/we have not/haven't c Yes, he has; No, he has not/hasn't d Yes, they have; No, they have not/haven't e Yes, we/you have; No, we/you have not/haven't
10
a Yes, I/we do; No, I/we do not/don't b Yes, I/we have; No, I/we haven't c Yes, I/we can; No, I/we cannot/can't d Yes, he was; No, he was not/wasn't e Yes, he does; No, he does not/doesn't f Yes, she was; No, she was not/wasn't g Yes, they have; No, they have not/haven't h Yes, they are; No, they are not/they aren't/they're not i Yes, I/we do; No, I/we do not/don't j Yes, she is; No, she is not/she isn't/she's not k Yes I/we did; No, I/we did not/didn't l Yes, I was/Yes, we were; No, I was not/wasn't/No, we were not/ weren't m Yes, he has; No, he has not/hasn't n Yes, there is; No, there is not/there isn't/there's not o Yes, he has; No, he has not/ hasn't p Yes, he did; No, he did not/didn't q Yes, I/we did; No, I/ we did not/didn't r Yes, I have; No, I have not/haven't s Yes, he is; No, he is not/he isn't/he's not t Yes, he did; No, he did not/ didn't u Yes, I/we have; No, I/we have not/haven't v Yes, they were; No, they were not/weren't w Yes, it does; No, it does not/doesn't x Yes, they do; No, they do not/don't y Yes, she can; No, she cannot/can't z Yes, it is; No, it is not/it isn't/it's not
11
a Yes, it will; No, it will not/won't b Yes, she will; No, she will not/won't c Yes, he will; No, he will not/won't d Yes, it will; No, it will not/won't e Yes, they will; No, they will not/ won't
12
a Yes, you must; No, you need not/needn't b Yes, you must; No, you need not/needn't c Yes, you/we must; No, you/we need not/needn't d Yes, you must; No, you need not/needn't e Yes, you must; No, you need not/needn't
13
a Yes, I/we had; No, I/we had not/hadn't b Yes, I/we had; No, I/we had not/hadn't c Yes, they had; No, they had not/hadn't d Yes, they had; No, they had not/hadn't e Yes, I/we had; No, I/we had not/ hadn't
14
a Yes, you should; No, you should not/shouldn't b Yes, you ought (to); No, you ought not/oughtn't (to) c Yes, they should; No, they should not/shouldn't d Yes, you/we should; No, you/we should not/ shouldn't e Yes, you ought (to); No, you ought not/oughtn't (to)
15
a Yes, you can; No, you cannot/can't b Yes you may; No, you may not c Yes, you may; No, you may not d Yes, you may; No, you may not e Yes, you can; No, you cannot/can't
16
a Yes, I would; No, I would not/wouldn't b Yes, he would; No, he would not/wouldn't c Yes, they would; No, they would not/wouldn't d Yes, she would; No, she would not/wouldn't e Yes, it would; No, it would not/wouldn't
17
a Yes, he is; No, he is not/he isn't/he's not b Yes, I/we did; No, I/we did not/didn't c Yes, he did; No, he did not/didn't d Yes, I/ we did; No, I/we did not/didn't e Yes, he is; No, he is not/he isn't/he's not f Yes, it is; No, it is not/it isn't/it's not g Yes, you can; No, you cannot/can't h Yes, I/we have; No, I/we have not/ haven't i Yes, I/we do; No, I/we do not/don't j Yes, you may; No, you may not k Yes, it does; No, it does not/doesn't l Yes, I/we had; No, I/we had not/hadn't m Yes, they can; No, they cannot/can't n Yes, I/we have; No, I/we have not/haven't o Yes, he was; No, he was not/wasn't p Yes, he did; No, he did not/didn't q Yes, I/we would; No, I/we would not/wouldn't r Yes, he has; No, he has not/ hasn't s Yes, I/we did; No, I/we did not/didn't t Yes, you must; No, you need not/needn't u Yes, you must; No, you need not/needn't v Yes, they are; No, they are not/they aren't/they're not w Yes, he did; No, he did not/didn't x Yes, he did; No, he did not/didn't y Yes, you should; No, you should not/shouldn't z Yes, she was; No, she was not/wasn't
18
(suggested answers) a My sister (did) b Tomorrow c I did/Me d (It's) mine e This poison (has) f Nothing g (I have been studying Catalan for) three years h My neighbour (was) i She is tall and pretty. She has long dark hair and blue eyes j Under the carpet
19
a have not/haven't (been to...) b is not/isn't (against...) c will not/won't/do not/don't (ban...) d I do too/I adore going to posh restaurants too e did not/didn't (fail...) f have (taken...) g will not/won't (be expelled) h did not/didn't (deny...) i did not/didn't (take...) j was not/wasn't (a...)
____________________
The contractions
's not and
've not are far less common.
'll not is not so usual as the forms given.
'd not is quite unusual.
'd not is rare.