1 We will be waiting here until he plugged in the laptop.
2 I forbid you to until he plugged in the laptop.
2 I forbid you to use the computer till you have been sixteen.
3 When Sophia comes back next month, it is three years since she was away.
4 Scientists fi n d it diffi cult to cure many illnesses until the level of technology was improved.
5 She never uses her mobile when the battery had been low.
6 Last week, Sam requires a refund when he discovers
nvenient as nowadays until the Internet ... (invent).
2) Correct the mistakes printed in bold. Explain your corrections.
1
1.
2.was
3.were
4.was
5.were
2.
2.did you buy it in Turkey?
3.did Stacey get one from him?
4.did Irina give it to you?
5.did Mark see it?
3.
2.when was he ...
3.why were they ...
4.who were
5.what was
6.where was...
4.
2.what did you have for lunch yesterday?
3.why did Steve go to New York?
4.when did you learn to play chess?
5.who did dance with you at Sally's party?
6.how often did you go sailing in the holidays?
5.
2.it wasn't a true story
3.there weren't ghosts in the castle.
4.there wasn't a monster in the lake
5.I wasn't silly.
6.
2.I didn't meet
3.sun didn't shine
4.we didn't go
5.I didn't know
6.I didn't dance
7.I didn't like