1
once in a while + [clause]
置于句首，用逗号隔开。
Once in a while, I go for a hike.
偶尔我会去远足。
偶尔；有时
先理解核心含义，再看它在真实句子里的用法。
偶尔；有时
Occasionally; sometimes.
Once in a while, I go for a hike.
偶尔我会去远足。
偶尔；有时。
Occasionally; sometimes.
I like to go hiking once in a while to enjoy nature.
我喜欢偶尔去远足，享受大自然。
She treats herself to a spa day once in a while.
她偶尔会犒劳自己一个水疗日。
Once in a while, we have a family game night.
我们偶尔会举办一次家庭游戏之夜。
置于句首，用逗号隔开。
Once in a while, I go for a hike.
偶尔我会去远足。
位于主语和谓语之间。
He once in a while eats junk food.
他偶尔吃垃圾食品。
置于句末，不需要逗号。
We have a party once in a while.
我们偶尔办一次派对。
Not this
I visit my grandparents once a while.
Use this
I visit my grandparents once in a while.
'once in a while'是固定短语，缺少介词'in'会导致语法错误。必须使用'once in a while'来表达“偶尔”的意思。
Not this
I once in a while go to the cinema.
Use this
I go to the cinema once in a while.
在英语中，副词短语'once in a while'通常放在句首或句末，而不是像频度副词那样放在谓语动词前。因此，应调整语序。
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用作状语，常置于句首或句末
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.