1) Does Tony play tennis on Saturday
Yes, he does.
He sometimes plays tennis on Saturday.
2)Does Tony go to the park on Saturday
No,he doesnt.
He  never goes to the park on Saturday.
3)Do Jenny and Lucy play tennis on Saturday
Yes, they do
They always play tennis on Saturday.
4)Do Jenny and Lucy watch films on Saturday
No, they dont
They never watch films on Saturday
5)Does Tony watch films  on Saturday
Yes, he does
He always watches films on Saturday