We need to buy some new furniture.
我們需要買一些新家具。
They've bought themselves a new car.
他們給自己買了一輛新車。
I went to buy a paper at the corner dairy.
我到街角的小店去買了份報紙。
You'll have to choose whether to buy it or not.
買還是不買，你得作出選擇。
Could you watch my bags for me while I buy a paper?
我去買份報紙，你能替我照看一下我的包嗎？