and反义词 - 与both

反义词是neither nor，意思是既不也不，例如：

1、Their house is neither big nor small.他们的房子不大也不小。

2、What might have happened is neither here nor there.曾经发生过什么事已经都不重要了。

3、I neither knew nor cared what had happened to him.我既不知道也不关心他出了什么事。