说明原因的句型:

　　1. There are two/some good reasons for sth./to do sth. …

　　生活条件改变的原因有两条。首先，我们一直在贯彻执行改革开放政策。其次，我们的经济在迅速发展并且出生率得到了控制。

　　There are two reasons for the changes in people’s living conditions. First, we have been carrying out an opening and reform policy. Second, our national economy is developing rapidly and the birth rate has been __________.

　　2. We have two good reasons for/against ...

　　我们有两条充分理由反对工业不受控制的发展。

　　We have two good reasons against the uncontrolled development of industry.

　　3. The reason for...is that + 从句

　　我们支持”希望工程”的原因是, 许多贫困地区的儿童付不起继续学业的各种费用。

　　The reason for us to support the “Project Hope” is that many children in poor areas __________ different kinds of expenses to continue with their schooling.