1.but是转折连词,可以接几乎任何相同成分的词类.
He can play football but can't play it well.(接句子)
He is inn't the hospital but in the bookstore.（接介词短语）
He isn't a dictionary but a storybook.（接名词）
2.其他的连词可以接句子,也可接非谓语动词或疑问词+不定式.
1.but是转折连词,可以接几乎任何相同成分的词类.
He can play football but can't play it well.(接句子)
He is inn't the hospital but in the bookstore.（接介词短语）
He isn't a dictionary but a storybook.（接名词）
2.其他的连词可以接句子,也可接非谓语动词或疑问词+不定式.