worth和cost的区别是什么在用法上有什么不同

worth是值多钱.cost是花费多钱

worth 是值多少钱.形容词
例如：It is worth 10 bucks(它价值10块)
cost 是多花少钱
例如：It costs 10 bucks to buy it（要花10块买它）

worth
adj., prep.
值…的；价值…的
a car worth $20000
价值2万美元的一辆小汽车
How much is this bicycle worth? It's worth ￡50.
这辆自行车值多少钱？值50英磅。
值得…的
It isn't worth waiting for him.
不值得等他。
词性变化
n.
价值
the true worth of one's friendship
某人友谊的真正价值
books of real worth
真正有价值的书
cost
vi., vt.
cost, costing
估价；估计…的成本；要价；价值（若干）；费；需
How much did that bag cost?
那个书包要多少钱？
The job was costed by builder at about $1500.
这件活儿施工人员估计要1500美元。
令遭损失；使失去（生命、健康等）
Your crime will cost you your life.
你的罪行将使你失去生命。
词性变化
n.
成本；费用
cost price
成本价格
The cost of living is going up.
生活费用在提高。
代价；价格
The cost of the house was too high for me.
对于我来说，这房子的价格太高了。
牺牲
He saved his daughter at the cost of his life.
他以牺牲自己的生命挽救了女儿。
习惯用语
at all costs 不惜任何代价 (= at any cost)
它们两个的主语一般都是物,既要花费的那个东西.
It cost sb some time/some money to do sth.还可以是花费时间,强调花费
Sth. worth some money/doing注重价值方面.

worth 是 值得 的意思
cost 是 某东西花了多少钱

两者表示的意思和用法都不相同：
1.意思：
worth：值多少钱.
cost：花费多少钱
2.用法：
worth doing sth 值得去做某事
cost sb.some money to do sth花费某人一些钱去做某事