※開頭：
When it comes to ..., some think ...
There is a public debate today that ...
A is a common way of ..., but is it a wise one?
Recently the problem has been broughtsintosfocus.
※提出觀點：
Now there is a growing awareness that...
It is time we explore the truth of ...
Nowhere in history has the issue been more visible.
※進一步提出觀點：
... but that is only part of the history.
Another equally important aspect is ...
A is but one of the many effects. Another is ...
Besides, other reasons are...
※提出假想例子的方式：
Suppose that...
Just imagine what would be like if...
It is reasonable to expect...
It is not surprising that...
※舉普通例子：
For example (instance)...
... such as A,B,C and so on (so forth)
A good case in point is...
A particular example for this is...
※引用：
One of the greatest early writers said ...
"Knowledge is power", such is the remark of ...
"...". That is how sb comments (criticizes/praises...).
"...". How often we hear such words like these.
※講故事
（先說故事主體），this story is not rare.
..., such dilemma we often meet in daily life.
..., the story still has a realistic significance.
※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 obviously seen.
Most people would agree that...
Some people may
