請客 的英文怎麼說?

[1] buy somebody something[2] treat somebody to something[3] pay for something[4] something is on somebody

Buy 用起來簡單又順口。也可以很白話的說 I'll pay for dinner. 請客有很多種英文說法，例如以下:

假如你數學拿滿分我就請你喝飲料 = I'll buy you a drink if you get full marks on the math test
我請你看電影 = I'll treat you to a movie
晚餐我請客 = Dinner is on me