表示对比

On the other hand, ...

In contrast, ...

However, ...

表示原因

There are three reasons for this.

The reasons for this are as follows.

The reason for this is that...

表示结果

As a result, ...

Consequently, ...

Therefore, ...

表示建议

It is recommended that...

It is advised that...

We should...

表示强调

It is essential that...

It is crucial that...

It is obvious that...

表示结论

In conclusion, ...

To sum up, ...

Overall, ...

表示引用

As the saying goes, "..."

It is said that...

It is well known that...

表示条件

If...

Unless...

Provided that...

这些句式可以帮助你在撰写大学英语议论文时更加流畅和有力地表达自己的观点。希望这些信息对你有所帮助!