一、表示两者的不定代词

　　英语中表示两者的不定代词主要有三个：both, either和neither。

　　① both的意思是“两者都”。注意体会以下句子：

　　Would you like milk or sugar or both? 你是想要牛奶还是糖，还是两者都要?

　　They have two grown children, both of whom live abroad. 他们有两个成年子女，都住在国外。

　　Oxford is not far from Stratford, so you can easily visit both in a day. 牛津与斯特拉特福相距不远，所以你可以方便地用一天时间参观这两个地方。

　　To know more about the British Museum, you can use the Internet or go to the library, or both. 为了更多地了解大英博物馆，你可以利用因特网或前往图书馆，又或两者一起(进行)。

　　② either 的意思是“两者中的任意一个”。 注意体会以下句子：

　　Unfortunately I was sitting at the table with smokers on either side of me. 真倒霉，餐桌上坐在我两边的人都抽烟。

　　I’ve lived in New York and Chicago, but don’t like either city very much. 我在纽约和芝加哥都住过，但两个城市我都不太喜欢。

　　There were glasses of champagne and cigars, but not many of either were consumed. 这里有香槟和雪茄，但两样东西都没怎么动。

　　They are able to talk openly to one another whenever either of them feels hurt. 他们俩无论谁感觉受到了伤害，都能够向对方坦言相告。

　　③ neither 的意思是“两者都不”。 注意体会以下句子：

　　“Which one would you choose?” “Neither. They’re both terrible.” “你会哪一个?”“两个都不要，它们都很糟糕。”

　　Thompson had two strategies, neither of which seems to have worked very well. 汤普森有两套行动计划，效果似乎都不太好。

　　We asked both John and Jerry, but neither one could offer a satisfactory explanation. 我们问了约翰和杰里，但两人都没有给出令人满意的解释。

　　I made a call to my parents yesterday. To my disappointment, neither of them answered it. 我昨天给父母打电话了。让我失望的是，他们俩都没有接电话。

　　二、表示三者的不定代词

　　英语中表示三者或三者以上的不定代词主要有四个：all, any, none和every。

　　① all的意思是“都”，表示三个或三个以上的人或物“都……”。注意体会以下句子：

　　She’s got four children, all under the age of five. 她有四个孩子，都不满五岁。

　　There are 76 individually furnished bedrooms, all with private bathrooms. 这里有76间陈设各异的卧室，都配有独立卫生间。

　　② any 的意思是“任何一个”，表示三个或三个以上的人或物当中“任何一个都”。 注意体会以下句子：

　　They’re all free — take any you like. 它们都是免费的——你喜欢哪个就拿哪个。

　　Always check the details carefully before you sign any written agreement. 在签任何文件之前都一定要仔细核对细节。

　　There were a lot of computers at the exhibition, any (one) of which would have suited me perfectly. 展览会上有很多电脑，无论哪一种都会非常适合我用。

　　Jane was asked a lot of questions, but she didn’t answer any of them. 简被问了许多问题，但是她一个也没回答。

　　③ none 的意思是“一个也不”“都不”，表示三个或三个以上的人或物当中“任何一个都不”。 注意体会以下句子：

　　She went to the shop to get some oranges but they had none. 她去商店买橘子，但都卖完了。

　　Although these were good students, none had a score above 60. 虽然这些都是好学生，但没有一个得分超过60分。

　　“Wow! You’ve got so many clothes.” “But none of them are in fashion now.” “哇! 你有这么多衣服。”“但是没有一件是如今流行的。”

　　另外，none还可用于不可数名词。如：

　　I wish I could offer you some cake but there's none left. 我真想请你吃点蛋糕，但一点也没剩。

　　I turned to bookshops and libraries seeking information and found none. 我去了书店和图书馆查找资料，但什么也没找到。

　　④ every 的意思是“每个”， 表示三个或三个以上的人或物当中“每个都”。 注意体会以下句子：

　　Julia wears a ring on every finger, but I wear only one. 朱莉娅每个手指上都戴戒指，而我只戴一个。

　　The head teacher knows every child in school by name. 这个校长知道在校的每一个孩子的名字。

　　Every guidebook in the series has been carefully written. 这套丛书中的导游手册本本都写得很细。