表示两者的both, either 与neither 1
这3 个词都用来谈论两者:both 意为“(两者)都”,either 意为“(两者中)任意一个”,neither 意为“(两者)都不”
若要指三者或三者以上,分别用 all 意为“(三者)都”,any 意为“(三者中)任何一个”,none 意为“(三者)都不”等
比较: He has two sons
Both of them are clever
他有两个儿子,都很聪明
He has three sons
All of them are clever
他有三个儿子,都很聪明
He has two sons
Either of them is clever
他有两个儿子,哪个都很聪明
He has three sons
Any of them is clever
他有三个儿子,哪个都很聪明
He has two sons
Neither of them is clever
他有两个儿子,两个都不聪明
He has three sons
None of them are clever
他有三个儿子,个个都不聪明
它们既可用作代词,也可用作形容词
用作形容词时,both 后接复数名词,而 either 和 neither 之后要接单数可数名词
Both of the brothers are here
=Both brothers are here
兄弟俩都在这儿
Either of the books is OK
=Either book is OK
两本书中哪一本都行
Neither of the stories is interesting
=Neither story is interesting
两个故事都没有趣