提出原因：
There are many reasons for ...
Why .... , for one thing,...
The answer to this problem involves many factors.
Any discussion about this problem would inevitably involves ...
The first reason can be obiviously seen.
Most people would agree that...
Some people may neglect that in fact ...
Others suggest that...
Part of the explanation is ...

进行对比：
The advantages for A for outweigh the disadvantages of...
Although A enjoys a distinct advantage ...
Indeed , A carries much weight than B when sth is concerned.
A maybe ... , but it suffers from the disadvantage that...

承上启下：
To understand the truth of ..., it is also important to see...
A study of ... will make this point clear

让步：
Certainly, B has its own advantages, such as...
I do not deny that A has its own merits.

结尾：
>From what has been discussed above, we may safely draw
the conclusion that ...
In summary, it is wiser ...
In short...
在作文中引用合适的名言警句，会给你的文章增色许多。这里收集了我本人喜爱的一些名言，可能会对你有用。我们使用引用的位置可以在开头结尾或正文段落中，
常见的使用形式如下：

One of the greatest early writers said ...
"Knowledge is power", such is the remard of ...
"......". That is how sb comment ( criticize/ praise...).
"......". How often we hear such words like there.

Useful quotations

Confucius 孔子
Our greatest glory is not in never falling...
but in rising every time we fall.

坚持
Mother Teresa
To keep a lamp burning we have to keep putting oil in it.

Henry Ford
Nothing is particularly hard if you divide it inuo small jobs.

Winston Churchill
Never, never, never, never give up.

Albert Einstein
In uhe middle of difficulty lies opportunity.

努力与成功
by Crassus
Those who aim at great deeds must suffer greatly.
Thomas Edison
There is no substitute for hard work.

Leo Tolstoi
The strongest of all warriors are these two- Time and Patience.

Thomas Jefferson
I'm a great believer in luck,
and I find the harder I work...
the more I have of it.
Robert Collier
Success is the sum of small efforts, repeated day in and day out.

Ray A. Croc
Luck is a dividend of sweat. The more you sweat, the luckier you get.

实际经验与间接经验
You'll learn more about a road by traveling it...
than by consulting all the maps in the world.

动机与结果
Vince Lombardi
Winning isn't everything...
but wanting to win is.

John F. Kennedy
We choose to go!to the moon and other things , oot because they are easy, but because they are hard.

Thucydides
The strong do what they will.
The weak do what they must.

为人态度：
John Wooden
Talent is God given--Be Humble.
Fame is man given-- Be Thankful.
Conceit is self given --Be Careful.

行动：
Theodore Roosevelt
Do what you can , with what you have , with where you are.

Publilius Syrus Maxim
No one knows what he can do till he tries.

Terence
There is nothing so easy but that it becomes difficult when you do it reluctantly.

Thomas Fuller
A wise man turns chance into good fortune.

William Hazlitt
Prosperity is a great teacher;
adversity is a greater.

William Penn
No pains, no palm;
no thorns, no throne;
no gall , no glory;
no cross, no crown.

Will Rogers
Even if you're on the right track, you'll get run over... if you just sit there.

Opportunity rarely knocks on your door.
Knock rather on opportunity's door if you ardently wish to enter.

成功与失败
Vince Lombardi
It's not whether you get knocked down.
...It's whether you get up again.

Winston Churchill
An optimist sees an opportunity in every calamity;
a pessimist sees a calamity in every opportunity.

热情（年轻/年老）
Ralph Waldo Emerson
Nothing great was ever achieved without enthusiasm.

成功与失败
Vince Lombardi
It's not whether you get knocked down.
...It's whether you get up again.

Winston Churchill
An optimist sees an opportunity in every calamity;
a pessimist sees a calamity in every opportunity.