多久一次用英语怎么说

“多久一次”用英语可以说作 "how often" 或 "how frequently."

这两个词都是由 "how"（多少）和 "often/frequently"（经常）构成，表示多久一次的意思。

下面是一些英文例句：

How often do you exercise? 你多久锻炼一次？
How frequently do you clean your house? 你多久打扫一次你的房子？
How often do you see your parents? 你多久见一次你的父母？
How frequently do you go shopping? 你多久去购物一次？
How often do you change your bed sheets? 你多久换一次床单？