In this analysis, the arguer claims that … should … To substantiate the conclusion, the arguer cites the example of … where … In addition, the arguer assumes that … This argument is unconvincing for several critical flaws.
For instance … since … what’s more … etc.
and how well it represented the public opinions..
The sample of the survey is not representative.
the sample is too small to...
the ratio of four to six
there is only figures but no proportion of the survey 还是ratio?
If the [respondents] only stand for a tiny proportion of the whole [group], we should not be so sure about the conclusion that [the whole group…]
The arguer commits a fallacy of hasty generalization.
It was only carried out in Sun City, but the arguer applies its result to all the company’s markets while doesn’t show us whether Sun City is a representative market of the whole markets.
the arguer commits a fallacy of hasty generalization. Even if the maintenance of the airline has been improved as a result of sending its mechanics to the Seminar, which is, of course, an unwarranted assumption, it does not follow that 就算怎样，也不怎样
The survey is based on two isolated examples. The arguer should survey more hospitals of both types.
The arguer commits a fallacy of begging the question in assuming that …
other possible causes of the …
To conclude, this argument is not persuasive as it stands.
I caught as many as twenty fish in two hours，but my brother caught many more. Tired from fishing，we lay down on the river bank，bathing in the sun. We returned home very late.
虽然形式是问句，但意义却是肯定的，并具有特别的强调作用，引起读者深思。如“Should We Learn to Do Housework?”(我们要不要学做家务?) 的结尾。
Everyone should learn to do housework. Don’t you aGREe，boys and girls?
在文章的结尾，把含义较深的话放在末尾，以点明主题，深化主题，起到画龙点睛的效果。如“I Cannot Forget Her” (我忘不了她)的结尾：
After her death，I felt as if something were missing in my life. I was sad over her passing away，but I knew she would not have had any reGREts at having given her life for the benefit of the people.
用比喻或含蓄的手法不直接点明作者的看法，而是让读者自己去领会和思考。如“A Day of Harvesting”(收割的日子)的结尾：
Evening came before we realized it. We put down our sickles and looked at each other. Our clothes were wet with sweat，but on every face there was a smile.
结尾回到文章开头阐明的中心思想或主题句上，达到强调的效果。如“I Love My Home Town”(我爱家乡)的结尾：
I love my home town，and I love its people. They too have changed. They are going all out to do more for the good of our motherland.
结尾表示对将来的展望，或期待读者投入行动。如“Let’s Go in for Sports”(让我们参加体育运动)的结尾：
As we have said above，sports can be of GREat value. They not only make people live happily but also help people to learn virtues and do their work bettter. A sound mind is in a sound body. Let’s go in for sports.