题目：请以”It's Our Duty To Protect Our Environment”为题，写一篇不少于60单词的作文。
It's Our Duty To Protect Our Environment
保护环境是我们的义务
It's our duty to protect our environment. Where do we live? The earth. The earth is the only one place we live in. So you know how important the environment is.
保护环境是我们的义务。我们居住在哪里?地球。地球是我们唯一居住的地方，所以可想而知环境对于我们的重要性。
But now, some people are harming the environment, like cutting down trees, drawing pictures on public walls, littering onto the ground. It's terrible if we still do it.
但是现在，很多人都在破坏环境，比如砍伐树木，在公共墙壁上乱涂乱画，随地扔垃圾。如果我们继续这样下去是非常可怕的。
Now, it's time for all the people in the society to protect the environment. It's our duty. It needs each of us to make a contribution to improving the environment. We should make our environment more and more beautiful.
现在，是人们保护环境的时候了，这是我们的义务，我们都要为改善环境做贡献，我们应该努力让我们的环境变得更好。
点评：作者多用学过的词语，不但保证了正确，还巩固了所学的知识，并且注意句型的多样化，如长句、短句、疑问句，使用了“if，so，now，but”等词，整篇文章读起来朗朗上口。实际上，写文章就像串珠子，连接词就在于把一个个单词串起来。
议论文常用的句型有：
1、论点：
Computer is important.
We must learn English well.
It's very important for us to...
In my opinion...
2、论证过程常用一些衔接词可使文章读起来流畅、紧凑。如：
Firstly, ... Secondly, ... Lastly, ... Above all, ... 等。
3、结尾强调观点，最好用不同的句型来表达相同的观点，如：
So we must...
So it's very important for us to...
I believe...
We should...
中考英语作文范例：树为什么重要
题目：请以"Why Are Trees Important"为题，写一篇不少于60单词的作文。
Why Are Trees Important
树为什么重要
Trees are very important to us. Do you know why? Let me tell you.
树对于我们非常重要，你知道为什么吗?让我来告诉你吧。
Trees take in carbon dioxide from the air and make oxygen. That's important. People and animals need oxygen to live. Many small animals and s live in the trees. Some of them also get food from trees. Trees can also stop water and soil from going away. If we have a lot of trees, we stop deserts from being large. I think this is very important. You know, trees are green. They can make our country even more beautuful.
树木可以吸收二氧化碳，并释放氧气，这非常重要。人类和动物需要依靠氧气生存。很多小动物和昆虫居住在树里，有些从树里获取食物。树木还可以防止水土流失。如果我们有很多树就可以阻止沙漠扩大。我认为这非常重要。众所周知，树是绿色的，它们能使我们的国家更加美丽。
Trees are our good friends. We should plant more trees and take good care of them.
树是我们的好朋友。我们应该种更多的树，并好好照料它们。
点评：文章先阐明观点，接着论证，最后重申自己的观点。