1 Is Ian good at playing / play the guitar?
2 Who left / did leave all this rubbish last night?
3 We’ve lived here for / since 18 months.
4 What have they eaten / did they eat for lunch yesterday?
5 Did / Was he use to teach maths at your school?
6 Does your sister stay / Is your sister staying with you this weekend?
7 Who did you see / saw at the bank?
8 I don’t think it ’s raining / ’ll rain tomorrow.
9 Mrs Matthias will meet / is meeting someone at three, but she can see you at four.
10 We were sitting / sat on a bench when the bus arrived.
11 I’m going to / ’ll see you at the theatre at eight o’clock.
12 When did they get / have they got back from Canada?