主语一致是一方面,Not only还不能在句首. Not only is she our teacher,but also our friend.主语一致但是not在句首要倒装. 不在句首时不用,如I not only heard it,but also saw it. 再问: 谢谢,Not only is she our teacher, but also(is) our friend。这里是否需要加is?还有这句话也是两个分句的主语是一致的,那就是可以换成正常语序she not only is our teacher, but also is our friend. 再答: 不加is,前句中is she直接用于后句,不要重复。 正常语序是she is not only our teacher, but also our friend. is前后一致,不要重复。