连接词作为引导词: 引导主语从句的连接词有，that, whether, who, what, which, where, how等
以 "that" 引导的主语从句: that引导的主语从句是最常见的一种类型，用来引导真实陈述等内容
例子: "That he won the competition really surprised me." (他赢得比赛真让我吃惊)
例子: "It is impossible that he could finish the project in one day." (他不能在一天内完成这个项目是不可能的)
例子: "That you have never been to Japan surprises me." (你从来没有去过日本让我很惊讶)
例子: "He told me that he would come back tomorrow." (他告诉我他明天会回来)
以 "whether" 引导的主语从句: whether引导的主语从句用来表达两个或多个选择中的一个
例子: "Whether we go out or stay at home, we will have a good time." (无论我们出去还是呆在家里，我们都会过得很好)
例子: "He asked whether I would like to join the team." (他问我是否愿意加入这个团队)
以 "who/whom" 引导的主语从句: who/whom引导的主语从句用来询问一个人的身份
例子: "Who is responsible for this mess?" (谁对这个烂摊子负责？)
例子: "Who can tell me where the nearest coffee shop is?" (谁可以告诉我最近的咖啡店在哪里？)
以 "what" 引导的主语从句: what引导的主语从句用来询问一件事、一种情况或一种可能性
例子: "What she said really surprised me." (她说的话真的让我吃惊)
例子: "What you think doesn't matter to me." (你怎么想对我来说不重要)
以 "which" 引导的主语从句: which引导的主语从句用来表达两个或多个选择中的一个
例子: "Which book you choose is up to you." (你选择哪本书取决于你)
例子: "Which of the two do you like better?" (这两个你更喜欢哪个？)
以 "where" 引导的主语从句: where引导的主语从句用来询问地点或位置
例子: "Where she lives is none of your business." (她住在哪里与你无关)
例子: "Where we go for vacation depends on the weather." (我们去哪里度假取决于天气)
以 "how" 引导的主语从句: how引导的主语从句用来询问方式、方法或程度
例子: "How he achieved such success remains a mystery." (他如何取得如此成功仍然是个谜)
例子: "How we solve this problem is crucial." (我们如何解决这个问题非常关键)
