Correct mistakes 1. they were working in silence for 10 minutes 2. we used not to go to the country 3. when you will finish your homework, we'll go for a walk 4. i'm afraid i'm no understanding you 5. when have you bought it? 6. sarah has rung me up just now 7. judt asked me why i didn't come to his party 8. we'll move to anew flat next week 9. i forgot! i must phone my granny at once 10. while mike did his homework his brother was playing