多久的英文：
【法】 quousque

How often do you go swimming
你多久去游泳一次

How long does the study of a correspondence course last?
整个函授学习的时间要持续多久？

He tried to keep his intentions well hidden, hub it didn't take too long to tumble to him.
他企图隐瞒他的意图，但没有多久就被人们看穿了。

In that article, he denounced the Asian miracle and believed that Asia’s growth could not be sustained.
他在这篇具争论性的文章里否定了亚洲的经济奇迹，并宣称亚洲的经济增长并不会持续多久。

You may stay as long as you please.
你愿意呆多久就呆多久。

How long will it last?
它将要延续多久？

How long did you spend afloat?
你在海上待了多久？

How long will the cast be on?
石膏要敷多久?

How long will it be playing?
那将上映多久?

How long is a satellite's lifetime?
卫星的使用期是多久？