1. (以疑问词what/when/where/ why/how + 主词+ 动词) 连结主句
I don't know what you said .
我不知道你说什么
Could you tell me where the bus stop is ?
可否请你告诉我公车站在哪?
We wonder why Sandy didn't come .
我们在想为何Sandy没有来
2. (以whether / if + 主词+ 动词) 连结主句
We are not sure whether it's true or not .
我们不确定那是否是真的
They asked me whether I was interested in working for them .
他们问我是否有兴趣为他们工作
Jane can't decide whether she should go or stay home .
Jane 无法决定是否要出去或留在家
3. (以that +主词+ 动词) 连结主句
I think that most people have kind hearts .
我认为大部分人心地善良
I'm glad that you're feeling better today .
我很高兴你今天觉得好多了
They believe that Linda told the truth .
他们相信Linda说了实话
