英语中的平行结构知识如下：
连词连接两个对等的词和对等的结构：并列连词and，but，as well as，or，or else，both … and，neither … nor，either … or，not only … but (also)，rather than等以及从属连词than可连接两个对等的词和对等的结构。
用法：
1、所连接的谓语形式必须一致。
例1：He went downtown,bought some books and visited his daughter.
例2：Gunpowder was discovered in the twelfth century,but not used in warfare until two hundred years later.
2、所连接的词或短语形式必须一致。
例1：Your semester grade is based not only on how well you do on each test,but also on how you participate in class.
例2：We often go to the countryside as well as to factories.
例3：I would much rather go to the countryside than stay here.
3、连接的非谓语动词的形式必须一致。
例1：Some find swimming more enjoyable than sitting at home reading.
例2：He was engaged in writing a letter rather than reading the newspaper.
4、所连接的句子结构必须一致。
例1：She is pleased with what you have given and all that you have told him.
例2：The purpose of the research had a more different meaning for them than it did for us.
某些特定的固定结构：
一、有些词后要用平行结构：prefer sth to sth、prefer doing sth to doing sth、prefer to do sth rather than do sth.
二、有些结构中要用平行结构：would、had rather、sooner do something than do something，would、had as soon do something as do something(宁可……也不……)。
三、部分强调句。
要强调句子的某一部分，可以把句子的结构改变一下，通常有两种表示强调的句式：It is / was … that …结构和What … is/ was…结构。
1、It is / was … that … 结构：可以用来强调句子中几乎任何部分。
2、被强调的部分指人时，可用who或whom，强调主语时，如果指的是人，可以不用that而用who来代替。强调宾语时，如果指点的是人，可用whom。
3、被强调部分指物时，要用that。
4、被强调部分是状语时，也只能用that，不能用when或where。
5、不能用It is / was … that 结构强调动词，强调动词常用do，过去式用did。