一、名词性从句

主语从句

- What he said is true.

- Whether she will come to the party is still unknown.

- Why she didn't attend the meeting remains a mystery.

表语从句

- The problem is that Tony has forgotten the man.

- It's obvious that she is the best player on the team.

宾语从句

- I wonder if you can finish the task on time.

- The reason why he was late is still unclear.

二、定语从句

关系代词

- This is the book which I like the most.

- The one who cleans the blackboard should be praised.

关系副词

- The movie that I watched yesterday was fantastic.

- The place where we met is now a café.

三、状语从句

时间状语从句

- When I arrived, the meeting had already started.

- While John was watching TV, his wife was cooking.

原因状语从句

- Because of the heavy rain, the match was canceled.

- Since she is ill, she won't be able to attend.

条件状语从句

- If you study hard, you will pass the exam.

- Unless you call her, we won't start the project.

四、其他类型

名词性从句：

It's important that we discuss the plan carefully.

表语从句：

The news that the company will expand is exciting.

宾语从句：

I don't know what to do next.

以上句子均包含从句结构，建议结合具体语境进行练习，注意引导词的选择和时态搭配。