在商店買東西時一般用I will take it,而不是用I will buy it.陳述買什么東西了的時候只能用buy,比如I bought a pen yesterday.

buy的用法例句：

1.Somehow, he'd managed to persuade Kay to buy one for him.

不知用了什么方法，他成功說服凱給他買了一個。

2.I might buy one for a friend's birthday as a giggle.

我可能會買一件送給朋友當生日禮物，逗他開心。

3.Who wants to buy a computer from a failing company?

誰愿意從一家要倒閉的公司買計算機呢?

4.Show me which one you like and I'll buy it for you.

指給我看你喜歡哪個，我給你買。

5.You can buy a formulation containing royal jelly, pollen and vitamin C.

可以買一種含蜂王漿、花粉和維生素C的配方產品。

6.They used to buy ten kilos of beef in one lump.

他們過去常買10公斤重的整塊牛肉。

7.Ford had the bright idea of paying workers enough to buy cars.

福特公司想出了一絕妙的主意：付給工人足夠的薪水去購買汽車。

8.They had to buy everything at inflated prices at the ranch store.

他們不得不在農場商店以高價購買所有東西。

9.Shopkeepers buy them in bulk and resell them for ￡150 each.

店主們先大量購進，然后再以150英鎊的單價將它們轉賣出去。

10.Although people sometimes buy property sight unseen, it'sa remarkably bad idea.

盡管人們有時沒看房就買了房，但這真是一個很糟糕的主意。