pay-spend-take-cost-区别

spend/pay/take/cost主语是人spendpayspend…onspend…(in)doingpayfor主语是物takeIttakessbsometimetodosth…cost值…spend……onsthspend……（in）doingsth1.Shespendshalfanhouronherhomework.=Shespendshalfanhour(in)______herhomework.2.Ispentonehundredyuan_______(buy)thisbook.=Ispentonehundredyuan____thisbook.doingbuyingon1.They________twoyears(in)buildingthisbridge.2.Anewcomputer_______alotofmoney.3.It_____themthreeyearstobuildthisroad.4.Ihaveto_______them20poundsforthisroomeachmonth.spentcoststookpaypay–paid–paid