要在写作中要根据上下文进行适当替换。
开头：
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.
提出观点：
Now there is a growing awareness that…
It is time we explore the truth of …
Nowhere in history has the issue been more visible.
进一步提出观点：
… but that is the 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…
举普通例子：
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 comment ( criticize/ praise…).
“……". How often we hear such words like there.
讲故事(先说故事主体)，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 obliviously 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 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 drawthe conclusion that …
In summary, it is wiser …
In short…
，托福作文辅导：作文中常用套句