变成否定句和疑问句.They are going to have a picnic next week.Will go to Beijing tomorrow.

否定句：They are not going to have a picnic next week.
They will not (won't) go to Beijing tomorrow.
疑问句：Are they going to have a picnic next week?
Will they go to Beijing tomorrow?

否定句
They aren't going to have a picnic next week.
They won't go to beijing tomorrow.
疑问句
Are they going going to have a picnic next week?
Will they go to beijing tomorrow?

They`ll not have a picnic next week.Won`t go to Beijing tomorrow.
Will they have a picnic next week Will they go to Beijing tomorrow?

They are not going to have a picnic next week.They will go
to Beijing tomorrow.
Are they going to have a picnic next week? Will they go to Beijing tomorrow?