They are busy working, can I talk to them?
No, I need to wait until they are done.
The students are learning in class, can I talk to them?
No, I can wait until they are on a break.
My friends are riding away in the car, can I go talk to them?
No, you could get hurt!
Can I talk to them now?
No, they are on the phone
Can I talk to them at recess?
Yes!
Can I talk to them now?
No, they are in the street
We're all playing a game together, can I talk to them?
Yes!
He's having lunch with me, can I talk to him?
Yes!