often

She often works at the weekend..她周末经常要上班。

If you wash your hair too often, it can get too dry..如果洗头过勤，头发会变得干枯。

How often do you see your parents?.你隔多久去看你父母？

Robin is a difficult child; you’ve said so yourself often enough (= a lot of times )..罗宾是个难管的孩子，你自己也常常这么说。

often as,尽管…常常

as often as,每当

more often,经常（更多频率）

more often than not,通常；多半

how often,多长时间一次

so often,偶然

most often,最经常；很多时候；通常来说

every so often,adv. 偶尔；常常；时常

all too often,时常，经常是

once too often,又一次；次数太多