从属连词 that 无意义，不作成分，不可省略 whether "是否"，不作成分，

不能用if代替 连接代词 what, who, whom,

whose, which 有词义，可作主语、宾语、

表语、定语 连接副词 where, when, why, how 有词义，作状语 　　

　　I don't like the idea that money is everything.

　　我不喜欢金钱就是一切这一观点。

　　We have some doubt whether they can complete the task on time.

　　我们怀疑他们能否按时完成任务。

　　We felt sad at the thought what he did and said.

　　一想起他的所作所为我们就感到难过。

　　I have no idea when he will be back.

　　 我不知道他什么时候回来。

　　即时演练1

　　句型转换

　　①She works hard. The fact is well known to us all.

　　→The fact that she works hard is well known to us all.

　　②When will he start？I have no idea about it.

　　→I have no idea when he will start．

　　③The question is not clear. We need more time to do the work.

　　→The question whether we need more time to do the work is not clear.

语法点三 同位语从句的注意事项 　　

　　1．分隔式同位语从句：有时同位语从句与其所说明的名词会被其他成分隔开，从而形成分隔式同位语从句，这样做主要是为了保持句子结构平衡，避免头重脚轻。

　　Word came that some wolves were caught around that village.

　　有消息传来说在那个村子周围捕获了几只狼。

　　即时演练2

翻译句子