1: I (not side) .don't ride.. horses
2: You (sell) .sell.. cars every month ?
3: He (not bring) .doesn't bring.. gifts
4: She (not take) .didn't.. pictures
5: It (not cost) ..didn't cost. so much
6: We (not seem) ..aren't seem. so happy 
7: they (buy) ..Do they buy. new products in summer?
8: michael (dancer) ..dances. beautifully
9: michel (not run) ..aren't run. fast
10: tim and cate (work) .work.. every day 
11: lucas and clara (not eat) ..aren't eat. meat

1. don't side
2.Do...sell?
3.doesn't bring 
4. doesn't take 
5. don't cost
6. don't seem
7. Do....buy?
8. dancers
9. doesn't run 
10. work
11. don't eat .......bạn xem có hiểu ko ?