GMAT语法点.docx

名词分类
（1）按名词特性分类：普通名词 ，专有名词，集合名词，物质名词，抽象名词；
普通名词：表人，物，地点；举例： sister，cat，canton
专有名词：表某人，某地，某物特有的名称 ，第一个字母大写； 举例Barack Hussein Obama ， Hachiko
（狗名），China, Mississippi
集体名词：表某类人 /物的集体名称；举例： John ' s Family ， company ，furniture,nation,party,class, herd
物质名词：表物质的名称（材料，食品，饮料等），举例： sugar， meat, paper, gas,bag,iron
抽象名词：表示品质，状态，动作，抽象概念的名称，举例： beauty, childhood,death ，
peace,herd,speed,energy,environment,pride,prejudice,weather
（2 ）按可数形式分类：可数名词，不可数名词
可数名词：能在前面加a/an的或another ， one，every，each ;能用于复数形式的；举例： a book; every person.
不可数名词：不能加a或another ， one，every，each等；不能用于复数形式的；举例： water, idea, courage
（3）5类名词与可数不可数之间的关系
普通名词为可数名词；举例： a desk， each house ， cats .
集合名词为可数名词；举例：（a） family ， （ each ） class， （ all） parties ， （ different ） nations
专有名词一般为不可数名词；举例： London ;但有些为可数名词，如 Communists ，french-men 。
物质名词一般不可数名词；举例： milk，gold，coffee，beer ;但有些可用作可数名词，表示特殊意
义，如：an ice-cream （一份冰淇淋），a light rain （一阵小雨）。
抽象名词既可作不可数名词，也可作可数名词（意义不同而变化）：
不可数：beauty 美agreement 同意
倍数表达方式
倍数表达方式： twice,three times, double, triple
形式
倍数 +as+adj/adv 原级 +as 举例：This apple is twice as big as that pear. My grandpa is three times as old as me. The foreigner run four times fast as i do. This bag is twice as big as that one.
Our house is three times as big as my friend ' s house.
倍数 +adj/adv 比较级 +than
举例：This apple is twice bigger than that pear.
My grandpa is three times older than me.
The foreigner run four times faster than i do.
This bag is twice bigger than that one.
Our house is three times bigger than my friend ' s house.
倍数 +the+Length/width,height/size( 长宽高)+of
举例：This wall is twice the width of that wall.
This ruler is three times the length of that eraser
Our house is three times the size of my friend ' s house.
as的用法
as作介词
当作+表身份/地位/人的特征名词作宾语
举例：
Although he had signed a pledge of abstinence as ab adolescent, Amy was 40 years old before s
he chose to become a temperance activist.
He came Shanghai as a tourist.
In Evolution time,women are considered as the me