you just finished physical education class. after that you take a bottle of water and sit in one of the chairs and drink the water. after drinking, you saw your senior walking towards you and when it was close enough, he said

"Can I have some?"

he said while showing the bottle of water you were drinking.

"i already drink on-" before you could finish your words, he took the water bottle

"I don't mind"

He said as he drank the water