三、人称代词并列使用时的顺序

1. 人称代词的排列顺序为单数人称代词通常按“二三一”排列，即you, he and I；复数人称代词通常按“一二三”排列，即 we, you and they：
You, he and I are of the same age. 你，他和我都是同一年龄。
We , you and they are all good citizens. 我们，你们和他们都是好公民。
但若是用于承担责任或错误等场合，则可把第一人称 I 置于其他人称代词之前：
I and Tom are to blame. 我和汤姆该受批评。
比较：Tom and I hope to go there. 汤姆和我想去那儿。
但是，you and I 是固定结构，语序通常不宜颠倒。 
2. 人称代词与名词的排序在通常情况下，人称代词在句子中出现在它所代替的名词之后，即先出现名词，再出现相应的代词。但是，在书面语中，有时也可出现代词，后出现代词所代替的名词：
As soon as it had hopped off, the plane picked up speed. 飞机刚一起飞，就加了速。(比较：As soon as the plane had hopped off, it picked up speed.)
3. 人称代词后跟名词同位语，有些人称代词后有时可跟同位语：
These small desks are for us students. 这些小课桌是给我们学生的。
We girls often go to the movies together. 我们女孩子常一起去看电影。
He asked you boys to be quiet. 他要你们男孩子安静些。

四、人称代词用作引导词的it

1. 用作形式主语,代替由动词不定式(短语)及其复合结构、动名词(短语)或主语从句等充当的真正主语。
It is a good habit to eat slowly.细嚼慢咽是个好习惯。
It is a delight for her to watch her daughter dance in the show.对她来说,观看女儿在节目中表演舞蹈是件乐事。
It is no use talking without doing.光说不做是没有用的。
It has been a great honour your coming to visit me.你的来访是我莫大的荣幸。
It seems strange that she should go from me.看起来好像很奇怪,她竟会离我而去。
2. 用作形式宾语,代替由动词不定式(短语)、动名词(短语)或宾语从句等充当的真正宾语。
He makes it a habit to take a walk after lunch.他每次午饭后总要去散散步。
I consider it useless discussing the matter with them.我认为和他们讨论这件事没有用。
You must find it exciting working here.你一定发现在此工作是激动人心的。
She considered it important that everything should be finished by eight.她认为在八点以前把所有的事情完成很重要。
3. 用于强调句型中。
It was Alexander who wore his best suit to the dance last night.是亚历山大昨晚穿着他最好的一套衣服去参加舞会。
It was last night Alexander wore his best suit to the dance.亚历山大是在昨晚穿着他最好的一套衣服去参加舞会的。
It was to the dance that Alexander wore his best suit last night.亚历山大昨晚穿着他最好的一套衣服是去参加舞会。
It was because he wanted to buy a basketball that he went to town yesterday.他昨天是由于想买个篮球而进城的。