UNIT 8: Grammar Check
ANSWER KEY
8.2
Group A
8.4
Group A
Can talk about ability in the present, past and future
Can give, deny or ask about permission in the future
with 'will/won't be able to/allowed to'
Can express obligation and necessity in the present
and near future with 'have to'
Can use 'had to ...'/'Did … have to…?' to refer to past
necessity and obligation
Can use 'needn't' and 'don't/doesn't have to' to
express absence of obligation in the present and
future
Exercise 1
1 managed
2 weren’t able
3 couldn’t
4 was able
5 managed
6 be able to
Exercise 2
1 couldn’t
2 be able/manage
3 will … able
4 can’t
5 can/could
6 couldn’t
7 managed/was able
8 won’t … able
9 can’t
8.2
Group B
Can talk about ability in the present, past and future
Can give, deny or ask about permission in the future
with 'will/won't be able to/allowed to'
Exercise 1
1 wasn’t able
2 could
3 managed
4 managed to
5 be able to
6 can
Exercise 1
1 had to finish
2 mustn’t leave
3 do you have to look
4 isn’t allowed to be
5 he be allowed to go
6 mustn’t go/isn’t allowed to go
7 has to go/must go
8 do we have to be
9 don’t have to be
Exercise 2
1 don’t have to finish
2 had to speak
3 aren’t allowed to talk
4 won’t have to take
5 Do you have to buy
6 must give
8.4
Group B
Can express obligation and necessity in the present
and near future with 'have to'
Can use 'had to ...'/'Did … have to…?' to refer to past
necessity and obligation
Can use 'needn't' and 'don't/doesn't have to' to
express absence of obligation in the present and
future
Exercise 2
1 manage
2 be able/manage
3 could/can
4 able
5 couldn’t
6 able
7 can’t
8 won’t … able
9 manage
Exercise 1
1 has to/must come
2 do we have to be
3 have to/must be
4 mustn’t be
5 won’t be allowed to go
6 had to look
7 isn’t allowed to/mustn’t go
8 does she have to stay
9 doesn’t have to return
Exercise 2
1 won’t have to tell
2 Do you have to go
3 must have
4 don’t have to take
5 had to pay
6 have to make
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PHOTOCOPIABLE
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