1. change the following sentences to negative and interrogative
1. they bought food in the supermarket
2. he went to the party
3. he practices french with his classmates
4. mr.green looked at the pictures and postcards
5. the visitor ought to stay here
6. martin is going to buy a new computer
7. she weighed 40 kilos last time
8. mary and peter are the same height
9. the clothing store opens every day
10. she can speak japanese
11. we will return home next sunday
12. we have dinner at mr. green 's house
13. they sing a happy song
14. he had a new house last year
15 yesterday they ate out
16. her partents drive her to school every day
17. they will be in grade 8 next year
18. susan made cakes yesterday
19. tom could swim two months ago
20. we love vietnam