Period Four　Grammar-Noun clauses as the appositive

阅读以下教材原句，仔细观察黑体部分并补全空格。

1．The thought that they could cross the whole continent was exciting.

2．Some people have the idea that you can cross Canada in less than five days，but they forget the fact that Canada is 5,500 kilometres from coast to coast.

3．The girls were surprised at the fact that ocean ships can sail up the Great Lakes.

1．以上例句中的黑体部分均为同位语从句，用来解释说明其前名词的具体内容。

2．以上从句的连接词均为that，在句中只起连接作用，无词义。

同位语从句就是在复合句中作名词的同位语的名词性从句。

1．同位语从句的功能

同位语从句对名词进一步解释，说明名词的具体内容。能跟同位语从句的名词一般是fact，news，idea，belief，thought，truth，hope，problem，question，information，wish，promise，answer，evidence，report，explanation，suggestion，conclusion等抽象名词。

(1)The fact that there is too much haze in Beijing makes some experts worried.

北京有太多雾霾这个事实让一些专家感到担心。

(2)I made a promise that I would make him happy.

我保证过我会让他高兴。

2．同位语从句的连接词

同位语从句的连接词主要有that，whether，why，who，where，how，when等。在同位语从句中that，whether不作成分，that无实际意义，whether表示"是否"；其他连接词具有实义，同时在同位语从句中作一定成分。引导同位语从句的连接词一般都不省略。

(1)Many parents hold the view that teenagers shouldn't spend too much time online.很多父母都持有这样的观点：青少年不应该花太多时间上网。

(2)He hasn't made the decision whether he will go there.他还没有作出决定是否去那里。

(3)The question who should do the work requires consideration.谁该干这项工作这一问题需要考虑。