初中英语 they weren"t fight each other but were playing together

初中英语 they weren"t fight each other but were playing together at this time yesterday 中
为什么有but were 为什么有were呢
he isn"t my borther but my friend中 就不是he isn"t my borther but is my friend呀 but什么时候要加be动词 什么时候不用加阿
Hellen_U 1年前 已收到1个回答 举报

小黑妹 幼苗

共回答了12个问题采纳率:83.3% 举报

he isn"t my borther but my friend 因为这是连接表语成份.
and /but/ or 接表语成份时,就可以省略很多.
Is it an apple or banana?
That is good and sound .
they weren"t fighting each other but were playing together
这是两个谓语成份,相当于并列句,省了主语.

1年前 追问

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Hellen_U 举报

并列句可以省主语 还可以省什么? 连接表语成份 还可以省什么?
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