宾语从句连接代词的用法

一·宾语从句的常见用法例句：
1 We know (that) we should study hard.(that可省略,它在句子中不担任成分）
2 I don't think he can pass tha exam.(think,believe,suppose后的that一般都省略）
3 They believed they would win the game.
4 You must take back what you said.(what是连接代词,连接主语you must take back和从句you said;what也是谓语动词said的宾语）
你必须收回你所说的话
5 Could you tell me who he is?(who即使连接词,又是表语）
6 I know who did the good deed.(who在从句中作主语）
我知道谁做的这件好事
7 He asked me which shirt I liked best.( which在从句中担任定语,修饰shirt)
8 I want to know when the plane will take off.(when既连接主句I want to know和从句the plane will take off,又担任时间状语）
9 Our teacher asked me why I was late.(why担任原因状语）
10 Mike asked me how I could do the work without any help.(how在从句中作方式状语）
11 We don't know if/wether our teachers will attend the class meeting.(if/wether连接主句We don't know和从句,不能省略）
12 Please let me know whether or not you'll come to the party.(wether or not不担任成分,起连接作用,不用if)
二·一般疑问句变为宾语从句时,语序变为申述句语序,用if/wether连接：
一般疑问句 宾语从句
1 Does he study hard?I wonder if/wether he studies hard.
2 Will they win?I asked if/wether they would win.
三·特殊疑问句变为宾语从句时,语序变为陈述语序,保留原来的疑问句：
特殊疑问句 宾语从句
1 Who is he?Do you know who he is?
2 What does he want?I don't know what he wants.
3 When did he leave?I know when he left.
4 Where will he arrive?She asked me where he would arrive.
5 How can I get there?Please tell me how I can get there.
6 How long did it take you tofinish the job?Did he know how long it took you to finish the job?
7 Why won't you spend the holiday with them?She wants to know why I won't spend the holiday with them.
8 Which skirt do you like best?My mother ask me which skirt I liked best.
*特例：对主语提问,特殊疑问句的语序不变,变为宾语从句时语序依然不变：
宾语从句 特殊疑问句
Who went there?I wonder who went there.