一、重点词汇精讲：
1. instance n.
例，实例
用法：for instance 例如，相当于for example
For instance, we sometime move our heads up and down when we want to say "yes". 例如，当我们想说"是"的时候，我们有时会点头。
2. exact : a.
正确的，精确的
派生词：inexact a. 不正确的，精确的;exactly adv. 正确地，精确地
同义词：correct a. 正确的， accurate a. 准确的，precise a. 精密的，精确的。
3. from side to side
从一边到另一边
We move our heads from side to side when we want to say "no".
当我们想说"不"的时候我们会摇头。
4. with the help of
在…的帮助下
People who can neither hear nor speak talk to each other with the help of their fingers.
既不能听也不能说的人借助手指交谈。
5. at a table
坐在桌旁
One day he entered a restaurant and sat down at a table.
有一天他走进饭店并坐在桌旁边。
6. consist of
由….组成 此动词短语没有被动语态。
例：Words consist of sounds, but there are many sounds which have a meaning and yet are not words. 词是由声音组成的，但是，有些声音有意义却不是词。
Language consists of words which we put together into sentences.
语言是由放在一起就能形成句子的词汇组成。
区别：
consist of , be made up of , be composed of
众议院由658位成员组成。
The House of Commons consisted of 658 members.
The House of Commons was made up of 658 members.
The House of Commons was composed of 658 members.
二、重点句型:
1. not only … but also
不但… 而且;连接两个并列的语法结构。
When we want to tell other people what we think, we can do it not only with the help of words, but also in many other ways.
当我们想告诉别人我们想什么时，我们不但可以借助于词汇而且也可以用许多别的办法。
我不但听到而且也看到了。
I not only heard it , but also saw it.
他不但会说英语，而且还会说日语。
He speaks not only English but also Japanese .
不但我不同意他的观点，而且其他同学也不同意他的观点。
Not only I but also other students disagreed with him .
不但我喜欢古典音乐，我的父亲也喜欢。
Not only I but also my father loves the classic music.
邱吉尔不仅是一位政治家，而且是一位诗人。
Not only was Churchill a statesman, but also a poet.
此处not only 放在句首，主谓倒装。