1、名词性从句一、连接词that，whether，if引导的名词性从句观察例句1It is possible that caffeine may cause birth defects(缺陷)in humans，too.2She asked me whether/if I had returned the books to the library.3Whether it is true remains a question.4The question is whether it is worth doing.5I think (that) you should turn to the teache
2、r for help.6My reason is that the cost will be too high.7The news that I have passed the exam is true.8The question whether he will join us is very important.归纳用法1that引导主语从句时，常用it作形式主语(如例1)，that不作从句的任何成分，但通常不可省略。2引导宾语从句的that不作从句的任何成分，常可省略(如例5)。3引导表语从句和同位语从句的that不作从句的任何成分，通常不可省略(如例6、例7)。4whether与if都可
3、以引导宾语从句(如例2)。5whether还可以引导主语从句(如例3)、表语从句(如例4)以及同位语从句(如例8)，其中引导同位语从句时不可以用if来替换。名师点津1动词find，feel，think，consider，make，believe等后面有宾语补足语时，需用it作形式宾语而将that引导的宾语从句后置，that通常不可省略。I think it necessary that we drink plenty of boiled water every day.2that引导两个以上的宾语从句时，通常只省略第一个从句中的that。3whether与if引导宾语从句时，大多数情况下可以互
4、换。但or not前面用whether；用于介词后的宾语从句也用whether引导。We dont know whether or not she was ready.Im interested in whether youve finished the work.4有时主句的谓语较短，而同位语从句的内容较长，这时为避免“头重脚轻”，常常将谓语部分提到从句前面，形成分隔式同位语从句。My wish will come true one day that I should buy a big house for my parents.即学即练1单句语法填空It is wonderful that
5、 all of us have passed the difficult exam!I wonder if/whether they are so eager to learn the technology.The reason for her absence was that she was ill.The question is whether you should accept their invitation.Tell me whether or not you are willing to do the work.He must answer the question whether
6、 he agrees with the opinion.二、连接代词和连接副词引导的名词性从句观察例句1I will do what I can to help him.2It has not been decided who will be sent there.3It is unknown when we will have our sports meet.4Go and get your coat.Its where you left it.5Thats why I want you to work there.6I dont know whose book this is.7I hav
7、e no idea what the boy is doing in the room now.8We havent yet settled the question where we are going to spend our summer vacation this year.归纳用法1引导名词性从句的连接代词有who，whom，whose，what等。它们不但起连接作用，还在从句中作主语(如例2)、表语、宾语(如例1、例7)、定语(如例6)等。缺少连接代词，从句不完整。2引导名词性从句的连接副词有when，where，why，how。它们不但起连接作用，还在从句中作状语，表示时间(如例
8、3)、地点(如例4、例8)、原因(如例5)和方式等。缺少连接副词，从句也不完整。名师点津引导名词性从句的还有“疑问词ever”，如whoever 、whomever、wherever、whichever等，它们在从句中充当某些句子成分。Whoever breaks the law should be punished.Wherever children go makes their parents worry.即学即练2单句语法填空He didnt tell us where we would meet next time.What worries them most is who let o
9、ut the secret.Tom has no idea how he can express himself clearly in English.The problem is where we should put our old furniture.The book can be helpful to whoever wants the job to pass the driving test.The question who should do the work is being discussed at the meeting.单句语法填空1Dont take it for gra
10、nted that your parents will do everything for you.2Now，he is still waiting to find out whether/if he has broken the record.3He promised to give a great reward to whoever found the watch.4“Thats exactly what I need，” Mr.Vincent said to himself.5Think about what you want in the coming year，then ask yo
11、urself why you want that.6Another possible reason is that on average，the British people dont take themselves too seriously.7What he did know was that he was very thankful for the opportunity given to him.8The two presidents talked by telephone on Friday，but the details of what they said were not ava
12、ilable.短文语法填空After being upset at opportunities in the UK，I left the UK for another country and discovered that understanding an 1.entirely(entire)new culture taught me a lot about how to get ahead.My life overseas began after reading an email about a government programme 2.with the aim of getting y
13、oung people over to that country.I 3.had considered(consider)no international work experience before，but，realizing that this was an opportunity not to be missed，I boarded a plane to the country.The main reason for people to go on such a voyage is to develop 4.a better understanding of a different cu
14、lture.The key to 5.getting(get)ahead in this country is to get connected with other people，which determines how business 6.is done(do)and how you succeed.Living abroad isnt as easy as I thought.Each day will present you with a new challenge 7.to be overcome(overcome)But it will wholly disappear with
15、 days when your taxi driver finally understands 8.where you need to go without you acting it out，days when you discover 9.tasty(taste)dishes cost only a small part of a Happy Meal，and days when the people youll remember forever or just for two weeks leave a lasting 10.impression(impress)on your life.