sth cost sb money 某物耗费了某人的钱
I pay 4000yuan for this computer.我花4000元买了这台电脑
=This computer costs me 4000yuan.这台电脑花了我4000元请问，还有么sb spend money in buying/ on sth 也可以 =I spend 4000yuan in buying this computer = I spend 4000yuan on this computer也是说我花了4000元买了这电脑