Unit 12 Answer key
Level 2
1 2 mother 's been cooking 3 2 How long have we been waiting?
& &
We've been waiting for twenty minutes.
3 We 've been playing
3 How long has she been playing the clarinet?
4 You 've been watching
She's been playing the clarinet since she
5 I 've been practising
was ten.
6 baby 's been crying
4 How long have they been living in Perugia?
7 Smith 's been working
They've been living in Perugia for two years.
8 They 've been feeling
5 How long have the potatoes been cooking in
the oven? They've been cooking in the oven
9 brother 's been living
for about ®ve minutes.
2 2 They haven't been playing computer games
&
4 2 been going
&
for three hours.
3 eaten
3 She hasn't been practising the violin for ten
minutes.
4 been waiting
4 The dog hasn't been barking for hours.
5 sent
5 We haven't been waiting for ten minutes.
6 known
6 You haven't been doing your homework all
7 been crying
night.
8 been playing
7 He hasn't been watching TV for hours!
9 said
8 I haven't been learning Spanish for a
long time.
# Cambridge University Press 2005 Level 2 Unit 12
LEVEL 2 UNIT 12
GRAMMAR PRACTICE