1) Put the verbs in brackets into the correct forms. 1 Kevin ... (change) his password when he realized that someone else was using his page.
2 When Kate buys herself a new computer next week, she ... (use) her old one for fi ve years.
3 We need to check the database until Mr. Smith ... (arrive).
4 Until she returns, you ... (hide) all of the appliances.
5 I ... (fi x) the printer for two hours when Jake entered the room.
6 Helen ... (not leave) the offi ce till her boss allowed her to.
7 They ... (not improve) the website until you require to do this.
8 Life had not been so convenient as nowadays until the Internet ... (invent).
2) Correct the mistakes printed in bold. Explain your corrections.
1 We will be waiting here 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 that his new digital camera is broken.
7 Until you bought me a cellular, I used a land-line phone.
8 Tomorrow Tom pay the connection fee when he go to work.
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