1．同位语从句与定语从句都可以译成定语

同位语从句：

The news that our team has won the final match is encouraging.

我们队取得决赛胜利的消息令人鼓舞。

定语从句：

The news that you told us is really encouraging.

你告诉我们的消息真的令人鼓舞。

2．同位语从句与定语从句都可以用that引导

同位语从句：

The suggestion that students should learn something practical is worth considering.学生应该学些实用的东西的建议值得考虑。

定语从句：

The suggestion that is worth considering is that the students should learn something practical.值得考虑的建议是学生应该学些实用的东西。

3.同位语从句与定语从句和其它名词性从句一样也要用陈述语序

同位语从句：

Have you any idea where have they gone？ (语序错误)

Have you any idea where they have gone？ 你知道他们去哪里了吗？

定语从句：

Do you remember the day when did you join our club?（语序错误）

Do you remember the day when you joined our club?

你记得自己什么时候参加我们俱乐部的吗