1.Long often goes to school by bike.
(-) Long doesn't often go to school by bike.
(?) Does Long often go to school by bike?
2.Minh and Van speak English very well.
(-)Minh and Van don't speak English very well.
(?)Do Minh and Van speak English very well?
3.They make noises every nights.
(-)They don't make noises every nights.
(?)Do they make noises every nights?
4.Nguyen always does homework after dinner.
(-) Nguyen doesn't always do homework after dinner,
(?) Does Nguyen always do homework after dinner?