1. He goes to school every morning.
(-) He doesn't go to school every morning.
(?) Does he go to school every morning?
2. Lan doesn't have good friends at school.
(?) Does Lan have good friends at school?
(+) Lan has good friends at school.
3. They are ready to go home.
(-) They aren't ready to go home.
(?) Are they ready to go home?
4. Nam likes to speak English.
(-) Nam doesn't like to speak English.
(?) Does Nam like to speak English?
5.The sky is cloudy this morning.
(-) The sky isn't cloudy this morning.
(?) Is the sky cloudy this morning?