usually和often有什么区别吗

often
adv.
经常, 再三
How often does the train run?
这火车多久一班?
【说明】此词一般用于动词之前, be 和助动词之后, 有时也用于句末以加强语气. 如: We often go there. We have often been there. We haven't been there very often.
习惯用语
as often as 每当
as often as not (=more often than not) 多次, 屡次, 往往
every so often 偶尔, 有时
once too often 又一次, 再一次, 次数太多
often and often 屡次三番, 经常
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usually
词性及解释
ad. 通常, 大抵