M3 Unit 5 Canada-"The True North"

Task I学习同位语从句结构，并能将同位语从句与定语从句用法进行区分并根据需要灵活使用。

【观察】Some people have the idea that you can cross Canada in less than five days.

The news that our team has won the match is true.

His delay is due to the fact that the car broke down halfway.

【发现】这些例句中的从句都是由_____引导的；从句的内容是对前面名词的___________;

在主从复合句中作同位语的从句称为同位语从句。同位语从句一般用that, whether，what, who, when, where, why, how 等词引导，常放在fact, news, idea, truth, hope, information, wish, promise, answer, evidence, report, explanation, suggestion, conclusion, problem, question等抽象名词后面，说明该名词的具体内容。

例：The news that they had won the game soon spread over the whole school.

他们比赛获胜的消息很快传遍了整个学校。

分析：they had won the game说明the news的内容，因此该句为同位语从句。

注意：1. 如同位语从句意义完整，应用that引导同位语从句。（即that 不充当任何成分，没有具体词义，只起连接作用）

例：The general gave the order that the soldiers should cross the river at once.

　　将军下达了战士们立即过河的命令。

分析：the soldiers should cross the river at once是the order的内容，且意义完整，因此应用that引导。

2. 如同位语从句意义不完整，需增加 "是否" 的含义，应用whether引导同位语从句。（if不能引导同位语从句）

例：We will discuss the problem whether the sports meeting will be held on time.

　　我们将讨论运动会是否会如期举行的问题。

分析：the sports meeting will be held on time意义不完整，应加 "是否" 的含义才能表达the problem的全部内容，因此应用whether引导同位语从句。

3. 如同位语从句意义不完整，需增加 "什么时候"、"什么地点"、"什么方式"等含义，应用when, where, how等词引导同位语从句。

例1：I have no idea when he will be back.