Those people做先行，There be的結構中;

例句：

1) Those who are for the plan, please raise your hands.

贊成計劃的人請舉手。

2) People who create computer viruses are called hackers.

制造電腦病毒的人被稱為黑客。

3) There was once a little boy who came to the net bar to play games every night.

曾經有一個小男孩每天晚上都來網吧玩游戲。

先行指人不定代，從中做主who要在;

先行詞是指人的不定代詞，如 one 、someone 、anyone 、nobody 等詞，或指人的關系代詞在定語從句中做主語，要用who, 而不用that。

例句：

1)Nobody who knows a little scientific knowledge will believe you.

懂得一點科學知識的人都不會相信你的話。

解析：nobody是指人的不定代詞，用who, 不用that。

2)The thief who pretended to be a manager was caught stealing a car.

那個裝扮成經理的賊在偷車時被當場抓獲。

解析：who指人，在定語從句中做主語。

兩個定從一起來，不要重復你有才;

一個先行詞有兩個定語從句時，關系代詞要避免重復使用。

A plant that can cure diseases, which was known by the ancient Chinese , is called Chinese herbal medicine. 一種能夠治病的，被古代中國人所熟知的植物，叫做中藥。