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cost过去式和过去分词：都是原型，过去式是cost，过去分词是cost。vt.花费；使付出；使花许多钱；估价，估算成本
释义
cost的过去式是cost，过去分词也是cost，句中作为名词和动词使用。
cost
英[kɒst]美[kɔst]
vt.花费；使付出；使花许多钱；估价，估算成本
vi.花费
n.费用，代价，成本；损失
短语
1、cost price 成本价;出厂价格;成本价格;原价
2、Implicit Cost 隐含成本;隐成本;隐性成本;内含成本
3、sunk cost 沉没成本;沉淀成本;沈没成本;[会计]旁置成本
4、Average cost [会计]平均成本;平均成本法;[经]平均代价;[经]平均费用
例句
1、This course is limited to 12 people and costs $150.
这门课程限招12人，费用为$150。
2、Painted walls look much more interesting and don't cost much.
粉刷过的墙壁看上去更有趣，要价也不高。
3、Did you reckon in the cost of the taxi?
你把坐计程车的费用计算在内了吗?
4、They deducted the cost of the broken window from his allowance.
他们从他的津贴中扣除损坏窗户的费用。
5、We have to weigh the cost of the new system against the benefits it will bring.
我们必须权衡一下起用新系统所需的成本和它将带来的效益。