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
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.