1)start,most scools,do,what taim,at составить предложение.
2)on,Saturdays, or Sundays,do, children to school,go составить предложение.
3) do, children, what, do, after,classes составить предложение.

What time do most schools start at?

Do children go to school on Saturdays or Sundays?

What do cgildren do after classes?