do/does
1.
They
not understand the lesson?
2.
Betty play the piano?
3.
you have a brother?
4.
the boys know the vocabulary?
5.
she have a sister?
6.
She
not like to swin?
7.
the men have a key?
8.
He
not work every day?
9.
the girls like to talk?
10.
it have four bedrooms?
;