cost作费用可数吗

　　cost作名词：

　　cost可以是可数名词，意为“费用;花费;价钱”，指购买、做某事或制造某物的总价值是多少钱。如：

　　The cost of a loaf of bread has increased five-fold. 一条面包的价钱增长了4倍。

　　Badges are also available at a cost of 2.50.

　　徽章也有卖的,2.5英镑一枚。

　　cost作为复数名词使用，意为“成本，费用”。如：

　　The company admits its costs are still too high. 该公司承认其成本仍然过高。

　　Costs have been cut by 30 to 50 per cent. 成本降低了30%到50%。

　　He was jailed for 18 months and ordered to pay 550 costs.

　　他被监禁了18个月,还责令他支付550英镑的诉讼费。

　　cost可以做为不可数名词使用，意为“成本，成本价”。如：

　　...a store that provided cigarettes and candy bars at cost.

　　按成本价出售香烟和糖果的商店

　　...a practice known as dumping – that is, selling below cost to drive competition out of business.

　　倾销行为——即通过以低于成本的价格销售产品来挤垮竞争对手

　　cost做为定语名词，通常用来修饰另一个名词。如：

　　cost consciousness; cost overruns.

　　成本意识；成本增量

　　cost作动词：

　　cost作及物动词，意为“费用；花费”的意思。

　　This course is limited to 12 people and costs 50.

　　该课程只招收12人,学费为50英镑。

　　Painted walls look much more interesting and doesn't cost much.

　　彩绘墙壁看上去更有趣而且花费也不高。

　　It's going to cost me over $100,000 to buy new trucks.

　　要买新卡车得花掉我10万多美元。

　　cost作不及物动词，指需要特定的费用、支出、努力或丢失：

　　It costs more to live in the city.

　　在城市居住要付出更多东西