I don’t think we two have met before.
We don’t believe that he could finish his work in such a short time.
She doesn’t think it is right for John to come late to school.
三、表语从句 (The Predicative Clause)：通常置于主句的系动词之后，说明主句主语的情况。
My idea is that we should help her do housework every Sunday.
Is that why you had a few days off?
It is because I have never heard of the story.
四、同位语从句 (The Appositive Clause)：常置于某些名词之后，对其内容作解释或补充说明。如:
advice, demand, doubt, fact, hope, idea, news, order, problem, promise, question, request, suggestion, truth, wish, word等。
The news that we won the game is exciting.
There is no doubt that he is the best player in their country.
比较：The idea that one can do the work without thinking is wrong. (同位语从句)
The idea that you put forward at the meeting is wrong. (定语从句)
c. 状语从句(Adverbial Clause)
He entered the room when (while, as) the meeting was going on.
When I meet the right chance, I will try my best.
While the teacher explained the text, the students listened attentively and took notes
He sang songs as he was taking a bath.
As spring warms the earth, all flowers begin to bloom.
注：when有时作并列连词意为“正在这时”、“突然”，在句末，不能位于句首。从句的谓语动词常用一般过去时，主句通常用过去进行时、过去完成时或be about to结构等。
She was about to leave when Mark arrived so she stayed a little longer.
He had been walking under the trees when an apple fell down.
Ⅱ) as soon as, hardly (scarcely, barely) … when… , no sooner …than… 等引导的时间状语从句，意为“ 一… 就 …”
Jack had scarcely /hardly seen me when he left the room.
The spy had no sooner returned home than he was told to go to another country.
注： 在no sooner … than, hardly … when …引导的时间状语从句中，若把no sooner, hardly, scarcely, barely 放在句首，则要用倒装结构。
No sooner had he heard the news than he fainted.
Scarcely had he entered the room when the telephone rang.职称英语考试