SAT2 | 玄数

2018-12-28

SAT Ⅱ

A four-digit pin number is needed to access a bank account. How many different four-digit pin numbers are possible if no number can be used twice, and the first and third digits must be odd, and the second and fourth digits must be even?

Answer
400. 访问银行帐户需要四位数的密码. 如果没有数字可以重复使用, 而且第一个和第三个数字必须是奇数, 第二个和第四个数字必须是偶数, 可以有多少个不同的四位数密码?

一、状语和条件、让步状语从句的对比

1.  简单句中的状语

He is ready to help you. …………… 他已经准备帮你了。
Given more time, we could done the work better. ……. 如果提供更多的时间,我们会做得更好。

2.  条件、让步状语从句

I’ll go out tomorrow unless
it rains.
我明天外出,除非下雨。 (条件)
I’ll go out tomorrow even if
it rains.
即使明天下雨,我还是外出。 (让步)
(主语 + 谓语+ 状语) 引导词 (主语 + 谓语)

it rains 已是“主谓”结构的语句,通过引导词作引导成为状语从句来修饰 “I’ll go out tomorrow”,引导词不同,整个句子表达的意思也就不一样

二、条件状语从句

条件、让步状语从句由从属连词 if、 unless ( = if not ) 、 as long as ( = so long as ) 引导

if:如果

unless ( = if not ) :除非,如果不

as long as ( = so long as ) :只要

He will come if you invite him. …………… 如果你请他,他会来的。
If I were you, I would go to see Mr.Lee at once. …………… 如果我是你,我会马上去找李先生的。
 
I’ll go out tomorrow unless it rains.  =  I’ll go out tomorrow if it dose not rain.
我明天外出,除非下雨。(如果明天不下雨,我会外出。)
 
I wouldn’t give up unless he give up first.  =  I wouldn’t give up if he doesn’t give up first.
我不会放弃,除非他先放弃了。
 
As long as you drive carefully, you will be very safe. …………… 只要你小心驾车,你会很安全的。
There is hope so long as he is with us. . …………… 只要他在就有希望。

三、让步状语从句

让步状语从句可由 though ( = although) 、 as、 even if ( = even though ) 、 whether … or not 、 no matter ( what、 who、 when、 which、 where、 how )

1.  though = although:虽然。 一般 although 只用在句首,而 though 可用在句中任何位置,他们都不能够与 but 连用

Althought ( Though ) he is young, he knows much. …………… 虽然他年轻,但他懂得很多。
He knows much though he is young.
He is young, but he knows much.
Althought ( Though )he is young, but he knows much. …………… (×)

2.  as:尽管,用倒装

even if ( = even though ) : 尽管,即使

whether … or ( not ):不管怎样,无论如何;
不论 … 还是 …

Cold as it was, we went on working in the field. …………… 尽管天气冷,我们继续在田里干活。
Tired as he was, he sat up late. …………… 他虽然疲倦,可仍然熬夜到很晚才睡。
 
I’ll go out tomorrow even if it rains. …………… 即使明天下雨,我还是外出。
Even though he tried, he still lagged behind other runners.
尽管他努力了,仍落在其他赛跑者之后。

I’ll go out tomorrow whether or no it rains. …………… 无论是否下雨,我明天将会外出。
Whether they go or stay, it makes no odds. …………… 他们是去是留都没多大关系。

3.  no matter ( what、 who、 when、 which、 where、 how ) :不论 ( 什么、谁、什么时候、哪一个、什么地方、如何) ,可以由 ~ever 构成的合成词替代

No matter what happens, I’ll always love you.  =  Whatever happens, I’ll always love you.
无论发生什么,我将永远爱你。
 
No matter who break the law, he will be punished.  =  Whoever break the law, he will be punished.
不论谁犯法,都要受到处罚。
 
No matter when you come, you’ll be welcome.  =  Whenever you come, you’ll be welcome.
无论你什么时候来,都欢迎。
 
No matter which they choose, we must accept their decision.
Whichever they choose, we must accept their decision.
不论他们选择哪一个,我们必须接受他们的选择。
 
No matter where she goes, there are crowds of people waiting to see her.
Wherever she goes, there are crowds of people waiting to see her.
不管她去到那里,总会有一群人在等她。
 
No matter how hungry I am, I never seem to be able to finish off a whole pizza.
However hungry I am, I never seem to be able to finish off a whole pizza.
无论我多么的饥饿,我似乎从来没有能够完成一整个比萨。

练习

翻译:
cylinder     圆柱,柱面
A right circular cylinder having a finite height with circular ends perpendicular to the axis as shown in the figure. If the ends are open, it is called an open cylinder. If the ends are closed by flat surfaces it is called a solid cylinder.

 
ellipse   椭圆
A closed, symmetric curve shaped like an oval, which can be formed by intersecting a cone with a plane that is not parallel or perpendicular to the cone’s base. The sum of the distances of any point on an ellipse from two fixed points (called the foci) remains constant no matter where the point is on the curve.

条件、让步状语从句 if


2018-12-28

SAT 2

There are 50 questions on the Math Level 2 Subject Test. Your raw score is the number of correct answers minus one-fourth of the number of incorrect answers, rounded to the nearest whole. Raw scores are transformed into scaled scores between 200 and 800. S = 800 – 10(44 – R), where S is the approximate scaled score and R is the rounded raw score.

Answer
数学2级科目考试有50个问题. 您的原始分是正确答案的数量减去错误答案数量的四分之一,四舍五入到最接近的整数. 将原始分转换为200到800之间的标准分. S = 800-10(44-R), 其中S是近似标准分,R是舍入的原始分.

一、where

关系副词 where 的先行词是地点 house、 school、 factory、 company、 city、 room … … 它在从句中做状语,也可以改用关系代词 that、which 或省略关系词,但要加上适当的介词。

This is a company.  +  My brother works at the company …… 这是一个公司。我哥哥在这公司工作。
This is the company where my brother works.
This is the company that / which my brother works at.
This is the company at which my brother works. …………… 这是我哥哥工作的公司。
 
This is the house where I lived two years ago. …………… 这是我两年前住过的房子。
Shanghai is a beautiful city where you can have a wonderful time.
上海是一个能让你玩得很开心的魅力城市。

二、when

关系副词 when 的先行词是时间 the day、a time、具体时间… … 它在从句中做状语,也可以改用关系代词 that、which 或省略关系词,但要加上适当的介词

I will never forget the day.  +  We have a good time on the beach at the day.
我永远不会忘记那一天。那一天我们在海滨上玩得很愉快。
 
I will never forget the day when  we have a good time on the beach.
I will never forget the day that / which  we have a good time on the beach at.
I will never forget the day on which  we have a good time on the beach.
我永远不会忘记我们在海边上愉快的那一天。
 
Spring is the time when most plants begin to grow.
春天是大多数植物开始生长的时候。

三、why

why 用于表示原因,它的先行词通常是reason

The reason why Jack went to see Mr. King is he was late for school.
The reason that Jack went to see Mr. King is he was late for school.
汤姆去见金先生的原因是他迟到了。

关系副词 where, when, why


2018-12-27

SAT 2

This means that you should register for the Level 2 Mathematics Subject Test in June after you complete a precalculus course. You can register for SAT Subject Tests at the College Board’s web site, www.collegeboard.org.

Answer
这意味着您应在完成预分类课程后于6月注册2级数学科目考试. 您可以在College Board的网站www.collegeboard.org上注册SAT科目考试.

陈述句 Declarative Sentence 是用来陈述事实或观点的句子,读降调。包括 肯定句 Affirmative Sentence否定句 Negative Sentence。一般否定句是在谓语动词后 + not。

一、be 动词

进行时和被动语态含有 be 动词,not 直接跟在 be 的后面

I am from China.   …………… 我来自中国。
I am not from China…………… 我不是来自中国。
 
You are reading a book. …………… 你在读书。
You are not reading a book. …………… 你不是在读书。
 
The first prize was won by Mary. …………… 一等奖由玛丽获得。
The first prize was not won by Mary. …………… 一等奖不是由玛丽获得。

二、 助动词 shall, will, have

They would go to the supermaket. …………… 他们会去超市。
They wouldn’t go to the supermaket. …………… 他们不会去超市。
 
I have watched the TV Wuthering Heights. …………. 我看过电视剧《呼啸山庄》。
I haven’t watched the TV Wuthering Heights yet. …………. 我没看过电视剧《呼啸山庄》。

当句子同时含有 shall, will, have 和 be 时,即共同构成被动态的将来时或完成进行时,not 放在 shall, will, have 后面

A new house will be build here in the future. …………… 将来会在这儿建造一座新房子。
A new house will not be build here in the future. …………… 将来不在这儿建造一座新房子。
 
I have been waiting for you all day. …………… 我整天一直都在等你啊。
I haven’t been waiting for you all day. …………… 我没有整天一直都在等你啊。

三、行为动词 do

行为动词的否定是为:do not (简写 don’t)+ 动词原形

I speak English.   …………… 我说英语。
I don’t speak English .   …………… 我不说英语。
 
They speak English.   …………… 他们 / 她们 说英语。
They don’t speak English.   …………… 他们 / 她们 不说英语。
 
Henry went to the museum three months ago.   …………… 亨利三个月前去过博物馆。
Henry didn’t went to the museum three months ago.   …………… 亨利三个月前没有去过博物馆。

四、情态动词

情态动词中的 must 作“必须”讲时,否定式 must not 并不是“不必要”的意思,而是“不许、禁止”。若想表达“不必要”,可以用 don’t need to

I can swim. …………… 我会游泳。
I can’t swim. …………… 我不会游泳。
 
You must go there alone. …………… 你必须单独去那儿。
You must not go there alone. …………… 你不能单独去那儿。
You don’t need to go there alone. …………… 你没有必要单独去那儿。

陈述句


2015-05-23

SAT 2

You can consult college catalogs and web sites to determine which, if any, SAT Subject Tests are required as part of an admissions package. Many “competitive” colleges require the Level 1 Mathematics Test. If you intend to apply for admission to a college program in mathematics, science, or engineering, you may be required to take the Level 2 Mathematics Subject Test.

Answer
你可以查阅大学目录和网站, 以确定入学套餐中需要哪些(如果有的话)SAT科目考试. 许多“有竞争力”的大学要求进行1级数学考试. 如果您打算申请入读数学, 科学或工程专业的大学课程, 您可能需要参加2级数学科目考试.

一、定义

动词的作用在英语语法里是相当的重要的,其内容也是非常丰富。每个句子至少由 “ 主语 + 谓语 ” 构成,谓语只可能是动词;而主语可以是名词、代词、数词以及动词不定式、动名词,其中动词不定式、动名词也属于动词中的一部分。所以说:动词在一个句子中是必不可少的,理解好动词的分类和用法对于我们学好英语语法是相当重要!

动词充当谓语来说明主语 “是什么” 或 “做什么”。 还能体系句子是什么时态:现在时、过去时、将来时

He is a doctor.  …………….. 他是一位医生。
My sister is dong homework now.  ………………. 我妹妹正在做作业。

二、分类

行为动词 work    study    swim 词义完整,可以独立作谓语
系动词 be        seem     become 不能单独作谓语,后面必须跟表语
助动词 shall     will       do     have 不能单独作谓语,没有词义,有数、人称的变化,表示时态
情态动词 can      may       must 不能单独作谓语,有词义,没有人称和数的变化
He plays football well.  ……………..他足球踢得好。(行为动词)
He is a doctor.  …………….. 他是一位医生。(系动词)
I will go to buy the newest Ipad tomorrow.  ……………. 明天我会去买最新的ipad。(助动词)
Lily can speak good Chinese now.   ………………. 莉莉现在能讲好中文了。(情态动词)

二、动词的变化形式

不定式:to do ,    过去式:did ,    过去分词:done ,    现在分词:doing

规则变化

第三人称单数 过去式 / 过去分词 现在分词
一般行为动词  + s + ed + ing
look —— looks —— looked —— looking

want —— wants —— wanted —— wanting

以不发音的 e 结尾  + s + d  去 e 再 + ing
use —— uses —— used —— using

close —— closes —— closed —— closing

以辅音字母 + y 结尾 变 y 为 i 再 + es 变 y 为 i 再 + ed + ing
carry —— carries —— carried —— carrying

study —— studies —— studied —— studying

以 s,sh,ch,x 结尾  + es + ed + ing
miss —— misses —— missed —— missing

push —— pushes —— pushed —— pushing

touch —— touches —— touched —— touching

fix —— fixes —— fixed —— fixing

重读闭音节结尾 + s 双写词尾字母再 + ed 双写词尾字母再+ ing
admit —— admits —— admitted —— admitting

swim —— swims —— swimmed —— swimming

少数以 ie 结尾 + s + d 变 ie 为 y 再 + ing
die —— dies —— died —— dying

lie —— lies —— lied —— lying

三、 动词的五种句型结构

1.  动词(不及物):

Birds fly. …………… 鸟飞。
He swims. …………… 他游泳。

2.  系动词 + 表语:

Her father is a doctor. …………… 她的父亲是医生。
She is beautiful. …………… 她长得漂亮。

3.  动词 + 宾语:

He likes music very much. …………… 他很喜欢音乐。
Lily opened the book. …………… 莉莉打开书了。

4.  动词 + 间接宾语 + 直接宾语:

The police asked me some question right now. …………… 警察刚刚问我一些问题。
Why she send me that odd message?   …………… 她怎么给我发了奇怪的信息?

5.  动词 + 宾语 + 补语:

I think the movie boring.   …………… 我认为这部电影无聊。
I hear the musican playing so beautiful.   …………… 我听到音乐家演奏得太精彩了。

动词