合成不定代词

1) somebody, someone
somebody 和 someone 意思相同，都表示“某人”。 somebody, someone 只用于肯定句，在否定及疑问句中通常用 anybody, anyone.

Somebody called you just now. 刚刚有人打电话给你。
Someone left me a note on the desk. 有人给我留了个纸条。
I saw somebody walking towards me. 我看到有人向我走来。
The old lady needs someone to look after her. 那位老妇人需要人照顾。

2) anybody, anyone
anybody 和anyone 意思相同，都表示“任何人，随便某一个人”。

Anybody who has questions please come to me. 谁有疑问都可以来找我。
Anyone who breaks the rules will be punished. 任何人违反规矩都会受到惩罚。
I don't want to wake anyone up when I come home late at night. 我晚归的时候不想吵醒任何人
I don't know anybody in the party. 晚会上的人我一个都不认识。

3) everybody, everyone
everybody 和everyone 意思相同，表示“人人，大家”。
Everybody, stand up. 大家都站起来。
Everyone laughed at the poor boy. 人人都嘲笑那个可怜的男孩。
The police questioned everyone in the room that night. 当晚警察盘问了屋子里的所有人。
We need everybody here today. 今天我们要所有人都到场。

4) something, anything
something 表示“某事物”，用在肯定句；在否定或疑问句中用“anything”，表示“任何事物”。
Something strange may happen before earthquake. 地震前可能会发生奇怪的事情。
Is there anything wrong with me? Why do you look at me in that way? 我有什么不妥的地方吗？你怎么这样看着我？
There is something wrong with my computer. I need to have it repaired. 电脑出了点问题，我要拿它去修理。
We can not decide anything at this moment. 这一刻我们不能做任何决定。

5) everything, nothing
everything 表示“一切”； nothing 用于否定句，表示“没有什么”。

Don't worry. Everything is fine. 别担心，这里一切都好。
Nothing special happened in that Valentine's Day. 情人节那天没发生什么特别的事情。
Money is not everything. 金钱不是一切。
I see nothing in the safe. 在保险箱中我什么都看不见。

6) nobody, no one
nobody 和 no one 意思相同，表示“没有人”。在句子中常作主语或宾语。

Nobody care about me. I feel so down. 没有人关心我，我很沮丧。
No one will take pity on the wicked murderer. 没有人会同情那个十恶不赦的杀人犯。
I want nobody but you. 我只需要你。
Apart from them, I had no one to talk to. 除了他们，我没有可以说话的人了。

*nobody 的特殊用法：还可以表示“无足轻重、无关紧要的人”：
He wants to be famous --- he is tired of being nobody. 他想要出名，他不想再当无名小卒了。
He was just a nobody before he saved the president's life. 在他救了总统一命前他不过是个无名小卒。