表示原因

There are three reasons for this.

The reason for this are as follows.

The reason for this is that…

表示益处或坏处

It has the following advantures.

It benefits us quite a lot.

We have good reason to believe that…

It has more disadvantures than advantures.

表示重要性

It plays an important role in our life.

表示措施

We should take some effective measure.

There are several ways to deal with the problem.

表示事实现状(常用在首段)

We cannot ingore the fact that…

It is ture that…

There is no denying the fact that…

表示比较

I prefer to read rather than watch TV.

表示看法(常用在首段或尾段)

People have take / adopt different attitudes towards sth

From my point  of view

People take different views of the question.

Some people believe that…others argue that…