1.That is the reason why I'm not in favour of revising the plan.
【句型分析】why I'm not in favour of revising the plan做the reason的定语从句。
2.His failure was due to the fact that he had not practised for a long time.
【句型分析】that he had not practised for a long time做the fact的同位语从句。
3.It is likely that it will rain in the evening.
【句型分析】It做形式主语，主语从句that it will rain in the evening做真正主语。
4.How they went to America is what I want to know.
【句型分析】How they went to America是主语从句，在整句话中做主语；what I want to know是表语从句，在整句话中做表语。
5.It occurred to him that he had left his key at home.
【句型分析】It做形式主语，that he had left his key at home主语从句做真正主语。
6.The reason why he came late was that he didn't catch the early bus.
【句型分析】why he came late是The reason的定语从句，对其起修饰作用；that he didn't catch the early bus是表语从句，在整个句子中做表语。
7.I'm looking forward to the day when Tai Wan returns to China.
【句型分析】when Tai Wan returns to China是定语从句，做the day的定语，对其起修饰作用。
8.He sat by the fire,reading a novel.
【句型分析】reading a novel是现在分词做伴随状语，其逻辑主语是句子主语he。
9.My dream came true at last.
10.It will not be long before we meet again.
【句型分析】before we meet again是时间状语，it指时间。
11.The English play in which my students acted at the New Year’s party was a great success.
【句型分析】in which my students acted at the New Year’s party是定语从句，做The English play的定语。
12.I worked in a business where almost everyone is waiting for a great chance.
【句型分析】where almost everyone is waiting for a great chance是定语从句，做a business的定语。
13.He kept looking at her,wondering whether he had seen her somewhere.
【句型分析】wondering...是现在分词做伴随状语，逻辑主语是he，whether he had seen her somewhere是宾语从句，做wondering的宾语。
14.It is a great honor for Beijing that the 2008 Olympic Games will be held in Beijing.
【句型分析】that the 2008 Olympic Games will be held in Beijing是同位语从句，做a great honor的同位语。
15.Timmy was fined a large sum of money by the judge for drunken driving.
16.Although he thought he was helping us with the work,he was actually in the way.
【句型分析】Although he thought he was helping us with the work是让步状语从句。
17.Most hotels have websites where you can find answers to your questions.
【句型分析】where you can find answers to your questions是定语从句，做websites的定语，对其起修饰作用。
18.That most of languages are now threatened and may disappear is a serious matter to the people.
【句型分析】That most of languages are now threatened and may disappear是主语从句，做整个句子的主语。
19.The fact that Great Britain is made up of three countries is still unknown to many people.
【句型分析】that Great Britain is made up of three countries是同位语从句，做The fact的同位语。
20.Now that you’ve got a chance,you might as well make full use of it.
【句型分析】Now that you’ve got a chance是原因状语从句。Now that：既然，因为。
21.It was only when I reread his poems recently that I begin to appreciate their beauty.
【句型分析】本句是It was...that...强调句型，被强调部分是only when I reread his poems recently时间状语从句。
22.As is reported in the newspapers,talks between the two countries are making progress.
【句型分析】As is reported in the newspapers是as引导的定语从句，修饰后面的句子talks between the two countries are making progress。
23.They came to the conclusion that not all things can be done by a computer.
【句型分析】that not all things can be done by a computer是同位语从句，做the conclusion的同位语。
24.Smoking does great harm to our health.
【句型分析】do harm to sth：对......有害。
25.Only then did he realize his mistakes.
26.Come and see me whenever you are convenient.
【句型分析】whenever you are convenient是时间状语从句。
27.I thought Jim would say something about his school report,but he didn’t mention it.
28.By the end of last year,another new gymnasium had been completed in Beijing.
【句型分析】By the end of last year是过去完成时或过去完成进行时的标志。
29.when and where to go for the on—salary holiday has not been decided.
30.I wonder why Jenny hasn’t written us recently.We should have heard from her by now.
【句型分析】why Jenny hasn’t written us recently是宾语从句，做动词wonder的宾语。should have done：本应该做某事而没做。
31.He will have learned English for eight years by the time he graduates from the university next year.
【句型分析】will have done：将来完成时。
32.I feel it is your husband who is to blame for the spoiled child.
【句型分析】并与从句it is your husband who is to blame for the spoiled child是it is...who...强调句型，被强调部分是your husband。
33.Rainforests are being cut and burned at such a speed that they will disappear from the earth in the near future.
34.It will not be long before we know the result of the experiment.
【句型分析】It will not be long before...，固定句型，不就之后......就......
35.Selecting a mobile phone for personal use is no easy task because technology is changing so rapidly.
【句型分析】Selecting a mobile phone for personal use是动名词短语，做整个句子的主语。
36.In such dry weather,the flowers will have to be watered if they are to survive.
37.Hundreds of jobs will be lost if the factory closes.
38.A new cinema is being built here.They hope to finish it next month.
【句型分析】is/am/are being done：现在进行时的被动语态。
39.The reporter said that the UFO was traveling east to west when he saw it.
【句型分析】that the UFO was traveling east to west when he saw it是宾语从句，做谓语动词said的宾语，when he saw it是时间状语从句，做宾语从句that the UFO was traveling east to west的时间状语。
40.All the preparations for the task have been completed,and we are really to start.
【句型分析】have been done：现在完成时的被动语态，be to do：将来时的谓语动词结构。
41.Try some of the juice——perhaps you will like it.
42.The price has gone down,but I doubt whether it will remain so.
【句型分析】whether it will remain so是宾语从句，做doubt的宾语。
43.No sooner had he got to the lab than he set out to do the experiment.
【句型分析】No sooner...than...：一......就......，No sooner引导的时间状语从句需用部分倒装结构。
44.Helen had left her key in the office,so she had to wait until her husband came back home.
45.An awful accident did,however,occur the other day.
46.In some western countries,demand for graduates from MBA courses has fallen down.
47.The evening news comes on at seven o’clock and lasts only thirty minutes.
48.It was not a serious illness,and she soon got over it.
49.The final examination is coming up soon.It is time for us to get down to our studies.
【句型分析】It is time for sb to do sth：某人该......了。
50.John was late for the business meeting because his flight had been delayed by a heavy storm.