Every coin has two sides.每个硬币都拥有两面，比喻事物的两面性。

The winter is coming and the spring is not far.冬天已经临近了，春天还会远吗？

Failure is the mother of success.失败是成功之母。

Practice makes perfect.耳熟能详并且能熟练的掌握该技巧。

How time flies!时间过得真快!

Great changes have taken place in our school since we took part in the civilized norms month activity.自从我们参加文明规范月活动以来，我们学校发生了巨大的变化。

We can get on well with our teachers and our classmates.我们可以和老师和同学相处得很好。

Some of us are so careful that we often help close the windows or the doors or turn off the lights.有些同学非常细心，经常帮助关窗户、门或关灯。

Some of us are kind enough to help the students in need.有些同学非常善良，愿意帮助有需要的同学。

Sadly, some of us pay no attention to what they are doing.令人遗憾的是，有些同学并不注意自己正在做什么。

For example, they care nothing about the environment.例如，他们完全不关心环境。

Sometimes they throw away rubbish here and there, and make a lot of noise.有时他们到处乱扔垃圾，还制造很多噪音。

First, second, third...； firstly, secondly, thirdly...； for one thing... （and） for another （thing）； to begin / start with, next, then, finally / last / lastly / last but not least表示列举和顺序。

Like； for example； such as； as you know； as we all know表示举例。

Again； also； besides表示语义增进和引申。

In the marathon of learning, be the swift cheetahs.在学习的马拉松中，要做敏捷的猎豹。

The difficult problems in study might be as dense as thorns, but they are precisely the tools to hone your speed.学习中的难题可能像荆棘一样密集，但它们正是磨砺你速度的工具。

Run with all your might, and you will break through the barriers of ignorance and dash towards the finish line of wisdom.尽全力奔跑，你将冲破无知的障碍，奔向智慧的终点。

Personally, I am standing on the side of...就个人而言，我站在……的一边。

Nowadays, it is generally/commonly believed that..., but I wonder that....如今，人们普遍认为......，但是我怀疑......

Like a coin has two sides, there is a positive aspect and a negative aspect to...如同硬币的正反面，......也有积极的一面和消极的一面。

do one's utmost to + V = do one's best尽全力去……

What about listening to...？听听音乐怎么样？

Try to guess …by…尝试通过……猜测……

The more…, the more…越……，越……

…is the secret to language learning.……是语言学习的秘诀。

I think…should…我认为……应该……

It’s a good idea to…这是一个好主意。

It's our duty to protect our environment.保护我们的环境是我们的责任。

We should not throw litter on the ground.我们不应该把垃圾扔在地上。

31. We should not spit in public places.我们不应该在公共场所吐痰。

这些句子在九年级上册英语作文中非常实用，可以帮助你丰富文章内容，使文章更加流畅和连贯。