1.Are going John and his friends to the library?
2.Where are going John and his friends?
3.Who goes to the library?
4.John and his friends are going to the library, aren't they?
5.Are going John and his friends to the library or cinema?
Did you do a home work?
i do my homework.
does she do your homework?
i play the gitar
he plays the gitar
can you play the gitar?
Maybe I will buy a house near the sea