How often ...
英
美
- how adv.怎样；多么；如何conj.如何；怎样；以...方式n.方式
- often adv.经常；时常；屡次
- How often do you hear from your sister?
你多长时间接到你姐姐一次信?
- How often do you have your car greased?
你多久才给小轿车上一次油？
- How often do you go to the library?
你多长时间去图书馆一次？
- How often do you wash your hair?
你多长时间洗一次头？
