宾语从句a.I think (that) he 'll return in an hour.我想他将在一个小时以后回来.b.She asked if/whether they had been to Beijing.她问他们是否到过北京.c.I don't know how old he is.我不知道他几岁.Please tell me where he works.请告诉我他在哪工作.I don‘t know why he hasn't come yet.我不知道他为什么还没有来.We believe that he is honest.我们相信他是诚实的.He asked why he had to go alone.他问他为什么必须一个人去.You don’t know when you are lucky.你身在福中不知福.The doctor insists that I give up smoking医生坚持要我戒烟.I suggest that we should go tomorrow.我建议我们明天走.状语从句I will call you as soon as I arrive in Beijing.我一到北京就给你打电话.（这是由as soon as引导的时间状语从句,从句中的谓语动词arrive是一般现在时,表示一般将来时,决不可用will arrive）
As soon as I have finished this work,I will go home.我一完成此工作,就回家.（从句中的谓语动词用现在完成时have finished,表示将来完成时,决不可用will have finished）
If he comes back,please let me know.如果他回来了,请通知我.（从句中的谓语动词用comes back,表示一般将来时,决不可用will come back）
1.Naturally ,our grandparents were pleased to get our phone call .(副词)
2.We worked hard ,from sunrise to sunset .(介词状短语)
3.To help my disabled aunt ,I spend an hour working in her house every day .(不定式)
4.Seen from a distance ,the farmhouse looked deserted .(过去分词)
5.I know how to light a camp fire because I had done it before .（原因状语从句）
I didn’t realize how special my mother was until I became an adult.
While John was watching TV,his wife was cooking.
The children ran away from the orchard(果园) the moment they saw the guard.
No sooner had I arrived home than it began to rain.
Every time I listen to your advice,I get into trouble.