sth. cost sb. +价钱中,当sth.为sth.单三时,cost要不要加s cost+sb+金钱
It cost sb+\u91d1\u94b1 for sth\u6216It cost sb+\u91d1\u94b1 to do sth\u6709\u8fd9\u6837\u7684\u7528\u6cd5\u5417?\u8bf7\u4e3e\u4f8b\u8bf4\u660e\u3002\u8c22\u8c22\uff01\u6709\u3002\u521d\u4e2d\u8bed\u6cd5\u3002
It cost me 3 yuan to buy this book.
this book cost me 3 yuan.
\u7b2c\u4e00\u4e2a\u8bed\u6cd5\u9519\u8bef\u3002
I cost 3 yuan for this book.
spend,take,cost\u548cpay\u7684\u7528\u6cd5\u533a\u522b
take spend cost pay\u7684\u7528\u6cd5\u90fd\u53ef\u4ee5\u8868\u793a\u201c\u82b1\u8d39\u201d\uff0c\u4f46\u7528\u6cd5\u5374\u4e0d\u5c3d\u76f8\u540c\u3002
spend\u7684\u4e3b\u8bed\u5fc5\u987b\u662f\u4eba\uff0c \u5e38\u7528\u4e8e\u4ee5\u4e0b\u7ed3\u6784\uff1a
(1) spend time \uff0fmoney on sth. \u5728\u2026\u2026\u4e0a\u82b1\u8d39\u65f6\u95f4\uff08\u91d1\u94b1\uff09\u3002\u4f8b\uff1aI spent two hours on this maths problem. \u8fd9\u9053\u6570\u5b66\u9898\u82b1\u4e86\u6211\u4e24\u4e2a\u5c0f\u65f6\u3002
(2) spend time \uff0fmoney (in) doing sth. \u82b1\u8d39\u65f6\u95f4\uff08\u91d1\u94b1\uff09\u505a\u67d0\u4e8b\u3002\u4f8b\uff1aThey spent two years (in) building this bridge. \u9020\u8fd9\u5ea7\u6865\u82b1\u4e86\u4ed6\u4eec\u4e24\u5e74\u65f6\u95f4\u3002
(3)spend money for sth. \u82b1\u94b1\u4e70\u2026\u2026\u3002\u4f8b\uff1aHis money was spent for books. \u4ed6\u7684\u94b1\u7528\u6765\u4e70\u4e66\u4e86\u3002
cost\u7684\u4e3b\u8bed\u662f\u7269\u6216\u67d0\u79cd\u6d3b\u52a8\uff0c \u8fd8\u53ef\u4ee5\u8868\u793a\u201c\u503c\u201d\uff0c \u5e38\u89c1\u7528\u6cd5\u5982\u4e0b\uff1a
(1)sth. costs (sb.) \uff0b\u91d1\u94b1,\u67d0\u7269\u82b1\u4e86\uff08\u67d0\u4eba\uff09\u591a\u5c11\u94b1\u3002\u4f8b\uff1aA new computer costs a lot of money. \u4e70\u4e00\u53f0\u65b0\u7535\u8111\u8981\u82b1\u4e00\u5927\u7b14\u94b1\u3002
(2) (doing) sth. costs (sb.) \uff0b\u65f6\u95f4,\u67d0\u7269\uff08\u505a\u67d0\u4e8b\uff09\u82b1\u4e86\uff08\u67d0\u4eba\uff09\u591a\u5c11\u65f6\u95f4\u3002\u4f8b\uff1aRemembering these new words cost him a lot of time. \u4ed6\u82b1\u4e86\u5927\u91cf\u65f6\u95f4\u624d\u8bb0\u4f4f\u4e86\u8fd9\u4e9b\u5355\u8bcd\u3002
\u6ce8\u610f\uff1acost\u7684\u8fc7\u53bb\u5f0f\u53ca\u8fc7\u53bb\u5206\u8bcd\u90fd\u662fcost,\u5e76\u4e14\u4e0d\u80fd\u7528\u4e8e\u88ab\u52a8\u53e5\u3002
take\u540e\u9762\u5e38\u8ddf\u53cc\u5bbe\u8bed\uff0c \u5e38\u89c1\u7528\u6cd5\u6709\u4ee5\u4e0b\u51e0\u79cd\uff1a
(1) It takes sb. \uff0b\u65f6\u95f4\uff0bto do sth. \u505a\u67d0\u4e8b\u82b1\u4e86\u67d0\u4eba\u591a\u5c11\u65f6\u95f4\u3002\u4f8b\uff1aIt took them three years to build this road. \u4ed6\u4eec\u7528\u4e86\u4e09\u5e74\u65f6\u95f4\u4fee\u5b8c\u4e86\u8fd9\u6761\u8def\u3002
(2)doing sth. takes sb. \uff0b\u65f6\u95f4,\u505a\u67d0\u4e8b\u82b1\u4e86\u67d0\u4eba\u591a\u5c11\u65f6\u95f4\u3002\u4f8b\uff1aRepairing this car took him the whole afternoon. \u4ed6\u82b1\u4e86\u4e00\u4e0b\u5348\u4fee\u8f66\u3002
pay\u7684\u57fa\u672c\u7528\u6cd5\u662f\uff1a
(1) pay (sb.) money for sth. \u4ed8\u94b1\uff08\u7ed9\u67d0\u4eba\uff09\u4e70\u2026\u2026\u3002\u4f8b\uff1aI have to pay them 20 pounds for this room each month. \u6211\u6bcf\u4e2a\u6708\u8981\u4ed820\u82f1\u78c5\u7684\u623f\u79df\u3002
(2)pay for sth. \u4ed8\u2026\u2026\u7684\u94b1\u3002\u4f8b\uff1aI have to pay for the book lost. \u6211\u4e0d\u5f97\u4e0d\u8d54\u4e22\u5931\u7684\u4e66\u6b3e\u3002
(3)pay for sb. \u66ff\u67d0\u4eba\u4ed8\u94b1\u3002\u4f8b\uff1aDon?\u84bat worry!I'll pay for you. \u522b\u62c5\u5fc3\uff0c \u6211\u4f1a\u7ed9\u4f60\u4ed8\u94b1\u7684\u3002
(4)pay sb. \u4ed8\u94b1\u7ed9\u67d0\u4eba\u3002 \u4f8b: They pay us every month.\u4ed6\u4eec\u6bcf\u6708\u7ed9\u6211\u4eec\u62a5\u916c\u3002
\uff085\uff09pay money back \u8fd8\u94b1\u3002\u4f8b\uff1aMay I borrow 12 yuan from you? I'll pay it back next week. \u4f60\u80fd\u501f\u7ed9\u621112\u5757\u94b1\u5417\uff1f\u4e0b\u5468\u8fd8\u4f60\u3002
\uff086\uff09pay off one's money\u8fd8\u6e05\u94b1\u3002
\u5728\u4eca\u5929\u7684\u8003\u8bd5\u5377\u4e2d\u51fa\u73b0\u4e86spend\u3002spend\u548ccost\u90fd\u6709\u82b1\u8d39\u7684\u610f\u601d
\u5728\u4e8c\u5341\u518c\u7b2c\u4e00\u8bfe\u4e2d\u7684\u53e5\u5b50\u4e2d\u6709My Walkman cost me two hundred dollars.
cost\u548cspend\u5230\u5e95\u6709\u4ec0\u4e48\u533a\u522b\u5462\uff0c\u4e0b\u9762\u6211\u4eec\u5c31\u6765\u770b\u4e00\u770b\u5427? ?br />
cost...\u67d0\u7269\u4ef7\u503c\u591a\u5c11\u5143the book costs 2 yuan. \u90a3\u672c\u4e662\u5143\u94b1\u3002
spend...\u67d0\u4eba\u82b1\u8d39\u591a\u5c11\u5143we spend 2 yuan buying the book. \u6211\u4eec\u82b1\u8d392\u5143\u4e70\u90a3\u672c\u4e66\u3002\u800c\u4e0d\u80fd\u8bf4\u6210\u662fwe cost 2 yuan...\u8fd9\u662f\u9519\u8bef\u7684\u3002
\u5c31\u662f\u8bf4cost \u7684\u4e3b\u8bed\u662f\u7269(\u67d0\u7269\u82b1\u8d39\u4e86\u591a\u5c11\uff09\u3002\u3002\u3002
spend \u7684\u4e3b\u8bed\u662f\u4eba \uff08\u67d0\u4eba\u82b1\u8d39\u4e86\u591a\u5c11\uff09
sth. cost sb. some money
sb. spend some money/time on sth./(in) doing sth.
The car cost him around ten thousand US dollars.
\u8fd9\u8f66\u82b1\u53bb\u4ed6\u4e00\u4e07\u7f8e\u5143\u5de6\u53f3\u3002
The error cost the company one million pounds.
\u8fd9\u9519\u8bef\u4f7f\u516c\u53f8\u635f\u5931\u4e86\u4e00\u767e\u4e07\u82f1\u9551\u3002
spend\u4e3b\u8bed\u53ea\u80fd\u662f\u4eba,\u8868\u793a".....\u5728....\u4e0a\u82b1\u8d39\u4e86....."
I spent $100 on the bike.
\u6211\u82b1\u4e86\u4e00\u767e\u7f8e\u5143\u4e70\u4e0b\u90a3\u8f86\u81ea\u884c\u8f66\u3002
They spent three month touring Europe.
\u4ed6\u4eec\u82b1\u4e86\u4e09\u4e2a\u6708\u65f6\u95f4\u5468\u6e38\u6b27\u6d32\u3002
take \u4e00\u822c\u7528it\u505a\u4e3b\u8bed\uff0c\u4f8b\uff1ait take sb sometime to do sth.
spend \u4e00\u822c\u662f\u4eba\u505a\u4e3b\u8bed\uff0c\u4f8b\uff1aI spend an hour to finish my homework.
cost\u8868\u793a\u67d0\u7269\u503c\u4ec0\u4e48\u7684\uff08\u4ef7\u503c\u6216\u94b1\uff09\u4f8b\uff1aThe bool cost 200yuan.
pay\u4e00\u822c\u662f\u4eba\u505a\u4e3b\u8bed\uff0c\u4f8b\uff1aI pay an hour to do my homework.
\u7cbe\u5c0f\u9510
cost 一般来说 某物花了某人多少钱 ，用过去时态 cost 的过去式仍是cost
但如果你要表达的是
这个教训的代价多大啊 要加s
how dear the lesson costs！
又如 living costs are higher in cities than in the country. 城市生活费用一般比乡村高
这个回答不知你还满不满意
但总之 祝你学习顺利 ！
扩展阅读：www.sony.com.cn ... prevent sb from doing ... sql between and ... cost pay spend ... sth cost sb money ... somebody to love ... suggest sb sth ... somebody people ... prefer sth to sth ...
