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一、同位语从句与定语 从句的相似之处
1、两种从句都可以译成定语 e.g. The news that our team has won the final match
is encouraging. （同位语从句） 我们队取得决赛胜利的消息令人鼓舞。
The news that you told us is really encouraging. （定语从句）你告诉我们的消息真的令人鼓舞。
2) Dad made a promise that excited all his children. （that指代promise，又在从句中充当主语。）
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Practice
I. Tell the function of the clauses in the following sentences 说出下列从句的功能：A: Appositive（同位语）; B: Attributive（定语） 1. His plan that we go there on foot is acceptable. 2. Many teachers hold the view that teenagers should not spend too much time online. 3.The first request that he made was to ask for freedom. 4. He made an excuse that his car broke down on the way. 5. Is this the company where your father works? 6. This is the reason that he gave for his absence.
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The fact that ocean ships can go there surprises many people.
1) What is the fact? The idea is that ocean ships can go there.
2) What surprises many people? i) The fact surprises many people.
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二、同位语从句与定语 从句的不同之处
2、引导从句的关联词that的功能不同：that 引导同位语从句时是一个纯连词，不充当任 何成分；而引导定语从句的that是关系代词， 既指代先行词又须在从句中充当成分。
e.g.1) Dad made a promise that he would buy me CD player if I passed the English test. （that 不充当任何成分）
e.g. We heard the news that our team
had won.
The fact how our team won the
game is a mystery.
The reason why our team won the
game is obvious.
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同位语从句的引导词常用that, wh-, how等。
how he can get the treasure.
where the concert will be held. who can finish the work.
why it happened. I have no idea
which pen is mine.
e.g. The news that our team has won the final match is encouraging. （从句说明“消息”的内容：我们队 取得了决赛胜利。） The news that you told us is really encouraging. （从句对“消息”加以限定：是你告诉我们的，而非 来自其他渠道。但消息是何内容却不得而知。）
fact, hope, idea, news, suggestion, order, reason, truth, possibility, doubt, thought, message, problem, promise 等等。
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同位语从句与定语从句的区别
比较： 同位语从句： 1.The suggestion that we discuss the problem all over again is a good one.
The suggestion that is worth considering is that the students should learn something practical. （定语从句）值得考虑的建议是学生应该学些实 用的东西。
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二、同位语从句与定语 从句的不同之处
1、从句的功能不同：同位语从句用来进一步 解释说明前面名词的内容；定语从句用来 修饰、限定前面的名词。
what we should do next. whom they are talking about.
whether it’ll rain tomorrow. that our football team won
the game.
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同位语从句跟在名词后面，表示该先 行词的具体内容。其后常用同位语从 句的名词主要是抽象名词，如：
ii) Ocean ships can go there surprises many people.
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Notes
一、同位语从句的概念 二、同位语从句的引导词 三、其后常用同位语从句的名词 四、同位语从句与定语从句的区别 五、名词性从句的种类
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同位语从句，即从句在句中作主语或宾语的同 位语，是对句子主语或宾语的解释、说明。
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一、同位语从句与定语 从句的相似之处
2、两种从句都可以用that引导 e.g. The suggestion that students should learn something
practical is worth considering. （同位语从句） 学生应该学些实用的东西的建议值得考虑。
What is the suggestion? The suggestion is that we discuss the problem all over again.
定语从句:
2.The suggestion that he gave at the meeting
was a good one.
Which suggestion was a good one? The suggestion that he gave at the meeting.