He is ill._____,he still works all day.为什么填However不填but?

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He is ill._____,he still works all day.为什么填However不填but?

He is ill._____,he still works all day.为什么填However不填but?
He is ill._____,he still works all day.
为什么填However不填but?

He is ill._____,he still works all day.为什么填However不填but?
主要看逗号,but不可用逗号和句子其他部分隔开,而however就可以.

However可以作为句子中的一个独立成分,也就是However 逗号 出现。
but必须用在一个完整的句子中。

两个词都是表示转折的连词,但是只有however 可以用在句首。

正式用语中BUT不能用于句首…