I will not tell you, as you already know. (since, because) 因为
You should walk as she wants you to. (in the same way) 正如，像….一样 B: As 经常和just, so,或者 so too连用：
Right: JUST AS the trains were late yesterday, the buses are late today.
Right: JUST AS the trains were late yesterday, SO TOO are they late today. 部分倒装 C: As 加介词短语 表比较：
Right: AS in the previous case， the judge took an early break.
（2）AS 作为介词，有三种用法
As your leader, I am in charge. 作为….
I think you as my friend. (= you are my ftiend) 是，似乎是
AS a child, I thought I could fly. 当我……的时候 要表比较只能用 as 加句子。 此时as是连词
（3）as…as 结构
第一个As 后面跟形容词或副词，第二个as 后面跟名词，短语，或者 一个句子
They are AS hungry AS you. They are AS hungry AS you are.
They are as hungry as they were last night.
（4）举例只能用As，不能用like；GMAT 规定的
（四）比较
1、Right: The man is FIVE TIMES AS OLD AS his grandson.
这个男人的年龄五倍于他的外孙 man's age = 5 x his grandson's age
Wrong: The man is FIVE TIMES OLDER THAN his grandson.
意思是男人的年龄六倍于他的外孙 the man is six times as old as his grandson、
numbers are \times greater than ... \other numbers GMAT中避免这种用法
只有两种固定用法：times as adj/adv as ； more adj/adv than， 要么增加adj+er +than
2、有时候用times, 不要as 或than, 表示直接修饰
The cost of a ticket is $12, six times the cost ten years ago.
The concert was attended by 300 people, twice the previous attendance.
Right: I am TEN years OLDER THAN you. 我的年龄= 你的年龄+10 Wrong: I am TEN years AS OLD AS you. 无意义
3、more, less 很灵活，可作名词，代词，形容词或副词
I own more than I should. 名词 (more = noun or pronoun)我拥有更多的东西比我应该拥有的； I own more shirts than I should. 形容词
I sleep more than I should. 副词 sleep不及物： 我睡得太多了比我应该睡得 但是在数量的比较上high ,low, higher, greater, lower 等只能用作形容词 ×I spend lower than I did last year.
√I spend LESS than I did last year.
√My bills are lower than they were last year. 4、重点 ：主语more和less的位置，特别是在一个adj+ n的前面,容易引起歧义 因为more less词性很多
(1)We have even more efficient engines than before. 此句意思模糊,应改为： We have even more engines that are efficient than before. 发动机数量的比较 或者We have engines even more efficient than before. 有效性的比较 (2)一些表示比较词，exceed, surpass，前后比较对象也要对等。 Wrong: The incidence of the disease among men exceeds women
Right: The incidence of the disease among men EXCEEDS the incidence among women. Right: The incidence of the disease among men EXCEEDS its incidence among women. Right: The incidence of the disease among men EXCEEDS that among women.
没有必要做出that是否只是指代incidence的区别，此处that含义上肯定指代整个短语
The incidence of the disease ，单独指代incidence 是没有意义的 incidence ['insid?ns] n. 发生率；影响；入射；影响范围
(3)In addition to，
通常放在句首，添加另外的一个例子。 翻译为 除了….. IN ADDITION TO taxes, death is inevitable . (添加在主语) IN ADDITION TO Munster cheese, I like Swiss. ( 添加在宾语) 习题：
1.Helen would feel better if she was my daughter 错误 改为were 错了不止一次
2.If the supplier has signed a binding contract, he will deliver the goods. 正确 signs 也正确，指的是现在或者将来会签订； has signed 已经签订 这个事实 可能是真的
3 If Abraham Lincoln were born in Livonia, he cannot become the President of the United States.
Correction: If Abraham Lincoln had been born in Livonia, he could not have become the President of the United States.
4. Because epidemiological evidence suggests that some tomatoes are contaminated with bacteria, Rachel suggested that Patrick make a salad without tomatoes. 第一个 suggest 表明，，暗示 第二个 是建议 后面加动词原形
5 15. Louise wanted to buy something to eat ,so she stopped at the ATM to withdraw some cash. to buy something to eat 作为want的宾语 to withdraw修饰stopped ,表明目的
6. The athlete's wearing the Brand X logo is a famous Olympian; his swimming has led to a lucrative endorsement contract.
根据逻辑，athlete是奥林匹克选手，而不是wearing Olympian [?u'limpi?n] n. 奥运会选手adj. 威严的；奥林匹克竞赛的；奥林匹斯山的
7. Of all the cities in Australia, Sydney is the largest and the most well-known; Melbourne, however,
can be equally as enjoyable to visit as its brasher, more frenetic rival.
equally as... as 在GMAT中永远错 as …as 本来就是平级比较 most well 应该是best
brasher 是自然存在的，直接用er ， freneticer 没有这个词，所以用more frenetic\\
brash [br??] adj. 无礼的，傲慢的；仓促的，性急的n. 骤雨；碎片；胃灼热 frenetic [fri'netik] adj. 狂热的；发狂的n. 疯子；狂人
8. There are about the equivalent number of gym members in the boxing class as in the aerobics class.
Correction: There are about as many gym members in the boxing class as in the aerobics class
比较的时候 as不能单独出现
9. The CEO earns twice higher than the average employee at this company.
twice higher than 错误，两个原因：
twice 不能修饰higher ，正确的搭配是twice as much as…
在数量的比较上higher 只能作为形容词，跟lower 一样； 不能修饰earns
As adj/adv as 同级比较 more +adj /adv than adj+er +than 动词时态、语态和主被动： 12th Edition: 122, 128, 139 Verbal Review: 80, 86, 95, 103 OR 2nd Edition: 76, 79, 81, 89, 99, 104 比较： 12th Edition: 108, 123, 125, 131, 136, 138,047,052 Verbal Review: 94, 98, 101, 105, 106 OR 2nd Edition: 87, 93, 97, 102, 103__
动词的时态变化 曼哈顿 294页 回顾 阶段 265 页 低阶 266高阶 矩阵在268
