一、句型
1、多用连词，尽可能把简短的小句通过逻辑连接词的手段连成长句子，这样更有逻辑性。例如：
One person says:"All has gone". The other person says:"There is still a little water."建议改为：
One person says,"All has gone"while/whereasthe other person says,"There is still a little water."
2、多用从句和非谓语动词形式,这样句式更为高级。例如：
Second,we can try to ride bicycles or take buses to go to school or work.Thus can reduce harmful gas.建议改为：
Second,we can try to ride bicycles or take buses to go to school or work，whichcan reduce harmful gas.或者
Second,in order to reduce harmful gas,we can try to ride bicycles or take buses to go to school or work.
二、如何展开论证
1、具体展开解释某个词的内涵。对前一句话中的某一个短语或是整句话的含义进行展开论证。
Some students are pursuingtoo high a goalwhen seeking for jobs. They care about various factors such as salaries, working conditions and so forth, which narrows their choice.第二句是对too high a goal的展开论证。
Optimistic attitude，as a positive attitude, not only means recognizing the existence of problems, but alsotakes active mentalityto solve problems.Once the difficult issue pops out unexpectedly, our positive mindset enables us to notice its good points and think of ways to avoid or improve its bad consequence.第二句是对takes active mentality的展开论证。
It is universally acknowledged that life is by no means perfect and whether we feel optimistic or not depends on what attitudes we take. When confronted with an adverse situation, some youths feel in low spirits and fall into depression. Others, on the contrary, look at the positive side of the situation and remain cheerful.第二句话是对第一句话的展开说明。
2.因果法
Optimistic attitude plays a significant role in our daily life，because optimistic can make us have confidence to cope with the setbacks when we encounter them.
3.反证法
Without the merit of optimism, we are more likely to experience more pains and end up with failure.
4.例证法
Numerous examples can be given, but this/these will suffice.
再使用谭剑波老师的2017《考研英语（二）写作高分特训》，书中充分的解析和丰富的例文，有助于我们进一步提高写作能力。