-They wear blue scarves.
Interogativ : Do they wear blue scarves ?
Negativ : They don't wear blue scarves.
-He took a photo yesterday.
I : Did he take a photo yesterday ?
N : He didn't take a photo yesterday.
-The girl flew a kite two days ago.
I : Did the girl fly a kite two days ago ?
N: The girl didn't fly a kite two days ago.
-She went to school last week.
I : Did she go to school last week ?
N: She didn't go to school last week.