若but后有主语(无论整个句子有一个或多个主语,主语是否一致),在but之前加逗号。
例:McCain ran for president, but I did not vote for him
若but后没有主语,不要在but之前加逗号。
例:McCain ran for president but did not win.
文中两句子可能属于并列关系,故用逗号。否则应该换成however或去掉逗号.
若but后有主语(无论整个句子有一个或多个主语,主语是否一致),在but之前加逗号。
例:McCain ran for president, but I did not vote for him
若but后没有主语,不要在but之前加逗号。
例:McCain ran for president but did not win.
文中两句子可能属于并列关系,故用逗号。否则应该换成however或去掉逗号.
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