多少钱一个月英语怎么说

"多少钱一个月"可以用"How much does it cost per month?"来表达。

"How much"是"多少"的意思，"does"是"助动词"，"it"是指"费用"，"cost"是"花费"的意思，"per"是"每"的意思，"month"是"月"的意思。

举个例子:
"How much does it cost per month to rent an apartment?"（租公寓一个月要花多少钱？）

"How much does a gym membership cost per month?"（健身房会员费每月要花多少钱？）