山东省高密市八年级英语 宾语从句的用法 专项训练三

八年级英语宾语从句练习题40题1<背景文章>One day, a student named Tom went to his English teacher, Miss Wang, and asked about the usage of object clauses. Tom said, "Miss Wang, I'm really confused about object clauses. Can you please explain it to me?" Miss Wang smiled and said, "Sure, Tom. An object clause is a clause that acts as the object of a verb. For example, 'I know that he is a good student.' Here, 'that he is a good student' is the object clause." Tom nodded and asked, "So, how can we tell if a sentence has an object clause?" Miss Wang replied, "Well, look for a verb followed by a clause that gives more information about what the verb refers to. For instance, in the sentence 'She believes ___ he will come tomorrow.', the blank should be filled with 'that' to form an object clause." Tom thought for a moment and then asked, "What are some common words that introduce object clauses?" Miss Wang said, "Words like that, if, whether are often used to introduce object clauses. For example, 'I wonder if he is coming.' or 'Do you know whether she likes it?'" Tom was starting to understand. "Thank you, Miss Wang. This is really helpful."1. In the sentence "I know ___ he is a good student.", the blank should be filled with.A. whatB. thatC. whichD. when答案：B。

八年级下册宾语从句解说与练习宾语从句小口诀：宾语从句三注意，时态语序指引词；主句一般此刻时，从句不需受限制；主句一般过去时，从句须用相应时；陈说句转变that引，一般疑问句用if/whether,特别问句疑问词，指引词后陈说式。

一、基本解说1 观点:在句中担当宾语的从句叫宾语从句，宾语从句可作谓语动词的宾语，也可做介词的宾语。

Hesaidhewasgoodatdrawing.(动词宾语)HeaskshimhowlongMikehasbeendown.(动词宾语)MissZhangisangryatwhatyousaid.(介词宾语)eg,2.连结词(1).陈说句转变为宾语从句时，指引词用that,口语中经常省略。

e.g,Shetoldme(that)shewouldliketogowithus.以whether或if指引的宾语从句,主要用来指引一般疑问句意思或选择疑问句意思的宾语从句，从句相同是陈说语序eg,Iwanttoknowif/whetheryouhavetoldthenewtoLiLei.注意：一般状况下，whether和if能够互用，但有些状况例外。

a.当从句做介词的宾于是只用whether不用ifeg,Wearetalkingaboutwhetherwe'llgoonthepinic.b.指引词与动词不定式或not连用时，只用whether.eg,Pleaseletmeknowwhattodonext.Couldyoutellmewhetherugoornot?c.if当假如讲时，指引的是条件状语从句，这时不可以用whether.(3).特别疑问句转变为宾语从句时，指引词用特别疑问词；指引词后要用陈说句语序。

E.g.Couldyoutellmewhat'sthematter\wrongwithyou?特别状况：：当doyouthink后接特别疑问句转变为宾语从句时，句式构造应为指引词＋doyouthink＋陈说句语序。

八年级下册宾语从句专项训练Class _________ Name ____________ NO.__________一、选择题1．I don't know _________ he will come tomorrow．_________ he comes，I'll tell you．A．if；Whether B．whether；Whether C．if；That D．if；If2．I don't know _________ the day after tomorrow．A．when does he come B．how will he comeC．if he comes D．whether he'll come3．Could you tell me _________ the nearest hospital is？A．what B．how C．whether D．where4．Could you tell me _________ the radio without any help？A．how did he mend B．what did he mendC．how he mended D．what he mended5．I want to know _________ ．A．whom is she looking after B．whom she is lookingC．whom is she looking D．whom she is looking after6．Do you know where _________ now？A．he lives B．does he live C．he lived D．did he live7．Do you know what time _________ ？A．the train leave B．does the train leaveC．will the train leave D．the train leaves8．I don't know _________ ．Can you tell me，please？A．how the two players are old B．how old are the two playersC．the two players are how old D．how old the two players are9．The small children don't know _________ ．A．what is their stockings in B．what is in their stockingsC．where is their stockings in D．what in their stockings10．I can't understand _________ ．A．what does Christmas mean B．what Christmas does meanC．what mean Christmas does D．what Christmas means11. He said ________ she would leave the message on the headmaster's desk.A. thatB. whereC. whichD. what12. In the bookshop, a reader asked the shopkeeper _______ Who Moved My Cheese was aninteresting book.A. thatB. howC. whatD. if13. A: Could you tell me ________ she is looking for?B: Her cousin, Susan.A. thatB. whoseC. whomD. which14. I want to know________.A. what is his nameB. what's his nameC. that his name isD. what his name is15. Could you tell me________?A. when did Tom come backB. when does Tom come backC. when Tom will come backD. when Tom comes back16. A: Could you tell me ________?B: I'm not sure.A. how many people have been out of hospitalB. when is Thanksgiving DayC. which animal does he like bestD. what time will the dolphin show start17. Mr. King didn't know ________ yesterday evening.A. when does his son come homeB. when his son comes homeC. when did his son come homeD. when his son came home18. The teacher told us yesterday that December 25 ________ Christmas Day.A. isB. wasC. has beenD. which19. I wonder ________ you would like to come to my birthday party.A. thatB. whetherC. that ifD. that whether20. A: I'm waiting for the mail. Do you know ________ it will arrive?B: Usually it comes by 4:00.A. howB. whereC. whenD. what21. Do you know ________ during the coming holiday?A. what will Tom doB. what did Tom doC. what Tom will doD. what Tom did22. The teacher told us that light ________ much faster than sound.A. travelsB. traveledC. would travelD. had traveled23. Do you know if ________ back next week? If he ________ back, please let me know.A. he comes, will comeB. will he come, comesC. he will come, comesD. will he come, will come24. What did Mike say? He said ____________________.A. if you were free the next weekB. what colour was itC. the weather is fineD. summer comes after spring25. Tom asked my friend ________________.A. where was he fromB. that the earth is bigger than the moonC. when did he come backD. not to be so angry26. Let me tell you __________________.A. how much is the carB. how much does the car costC. how much did I pay for the carD. how much I spent on the car27. Peter knew _______________.A. whether he has finished reading the bookB. why the boy had so many questionsC. there were 12 months in a yearD. when they will leave for二．按要求转换句型。

八年级英语宾语从句练习题40题1.Could you tell me ____ you had a good time yesterday?A.thatB.ifC.whenD.where答案：A。

解析：本题考查宾语从句连接词。

句子表达“你能告诉我你昨天玩得很开心吗”，“你昨天玩得很开心”是一个陈述句，用that 引导。

if 表示“是否”；when 表示“什么时候”；where 表示“哪里”，均不符合题意。

2.I believe ____ he will come back soon.A.thatB.ifC.whetherD.when答案：A。

解析：“我相信他很快就会回来”，是陈述句，用that 引导。

if 和whether 都表示“是否”；when 表示“什么时候”，不符合。

3.She said ____ she knew the answer.A.thatB.ifC.whetherD.what答案：A。

解析：“她说她知道答案”，陈述句用that 引导。

if 和whether 表示“是否”；what 引导宾语从句要在从句中充当成分，不符合。

4.We know ____ the earth is round.A.thatB.ifC.whetherD.when答案：A。

解析：“我们知道地球是圆的”，是陈述句，用that 引导。

if 和whether 表示“是否”；when 表示“什么时候”，不符合。

5.They told me ____ they had seen the movie.A.thatB.ifC.whetherD.when答案：A。

解析：“他们告诉我他们看过那部电影”，陈述句用that 引导。

if 和whether 表示“是否”；when 表示“什么时候”，不符合。

6.He thinks ____ it will rain tomorrow.A.thatB.ifC.whetherD.when答案：A。

宾语从句宾语从句的种类宾语从句是一种名词性从句，在句中作及物动词的宾语，或介词的宾语，或形容词的宾语。

依据指引宾语从句的不一样连词，宾语从句可分为三类。

1.由 that 指引的宾语从句。

that 只有语法作用，没有实在的意义，在口语和非正式文体中能够省略。

比如：He said (that) he wanted to stay at home. She doesn ’ t know (that) she is seriously ill. I am sure (that) hewill succeed.2. 由连结代词who, whom, whose, what, which 和连结副词when, where, why, how 指引的宾语从句。

这些连结代词和连结副词在宾语从句中充任某个成分。

比如：Do you know who (whom) they are waiting foe? He asked whose handwriting was the best.3.由 if 或 whether 指引的宾语从句。

if 和 whether 在句中的意思是“能否”。

比如：I want to know if (whether) he lives there. He asked me whether (if) I could help him.（二）宾语从句的语序宾语从句的语序应为陈说句的语序。

比如：I hear (that) physics isn ’ t easy. I think (that) you will like this school soon.Can you tell me how I can get to zoo?Please tell me when we ’ ll have the meeting.（三）宾语从句的时态1.假如主句的时态是一般此刻时，宾语从句该用什麽时态就用什麽时态。

初二英语：宾语从句专题第一部分:1-50 专项练习第二部分:51-100全面解析1．—Dad, can you tell me __________ to the amusement park?—The day after tomorrow.A．when we are going B．when we wentC．when are we going D．when did we go2．—Could you please tell me _____ mooncakes traditionally in China, Li Hua?—During the Mid-Autumn Festival.A．when people ateB．when people eatC．when do people eat3．—Many people talk about "Didi". I really wonder _____.—Just call to order a taxi through it on your mobile phone.A．how can I use it B．how I can use itC．why people use it D．why do people use it4．—Can you tell me _____ when you are alone at home?—Free but lonely.A．how you felt B．how do you feelC．how did you feel D．how you feel5．I'm not sure whether _____ put little computers into their heads in the future.A．will people B．people will C．people D．people did 6．He looks worried. I wonder _________ he has already known about the result.A．where B．whether C．why7．Daddy and Mummy, you are back from the supermarket. Can you tell me ?A．how you go thereB．how many pieces of bread you buyC．how much milk did you buyD．if you bought my favourite ice cream8．—I didn't know .—Me, too.A．that they are preparing for a new reportB．where would we have a meetingC．when will the movie beginD．if we could stop polluting9．—Could you tell me_________?—Yes, to get my ID card back.A．how did you come here B．what is the matter with youC．when you came here D．why you came here10．Do you believe ___________?A．he says B．what he say C．his say D．what he says 11．— Will Sam go swimming with us tomorrow?— I think he will go if he ________ free.A．be B．was C．is D．will be 12．Tom asks his father ____him to Shanghai Disneyland.A．when he will take B．when will he take C．when he took 13．—Could you tell me_______, doctor?—Nothing serious.A．what the matter is with the little boyB．what's the wrong with the little boyC．what's the matter with the little boy14．—Excuse me, could you tell me from here to the airport?—Sure, it's about 120 kilometers.A．how far it is B．how long it takesC．how far is it D．how long does it take15．—Could you tell me ?—OK, walk along the road, and it is between the bookstore and the shop.A．what the restaurant isB．which is the way to the restaurantC．where is the restaurant16．Can I ask __________ you __________ to China before?A．what; have been B．if; have beenC．how; have gone D．if; have gone17．—I love that storybook, but I don't know ________.—On the North Street, Xinhua Bookstore.A．where I can buy it B．when it is on sale C．what it is about 18．—Could you tell me ______ yesterday?—Because my bike was broken on the way home.A．why you came late B．why do you come lateC．why did you come late D．why you come late 19．—Excuse me, how long will it take me to get to the post office?—Well, it depends on _______.A．how you will get there B．when you will get thereC．where you will get D．how will you get there 20．Today is Father's Day. I'm thinking about _______.A．what present I gave my fatherB．if I planned a party for my fatherC．how I can give my father a surpriseD．where will my father and I have a big meal21．Could you please tell me_______?A．how can I make the machine to work B．how I can make the machine to work C．how I can make the machine work D．how can I make the machine work 22．—She didn't tell me _______the shirt.—I bought it from the supermarket in front of our school.A．where you buy B．where do you buyC．where did you buy D．where you bought23．I wonder_________ the idea to David or not. He still looks angry.A．if you mention B．whether have you mentionedC．if have you mentioned D．whether you have mentioned 24．—I wonder _________or not Lisa can pass the driving test.—Of course she can. She practises it really hard.A．how B．if C．whether D．that25．—Did Alice tell you __________to get to the station?—Yes, she said we would meet there at ten.A．how B．what C．when D．where 26．—Could you tell me__________?—Look! He is playing volleyball over there.A．what is Tom doing B．how Tom did itC．where Tom is D．why Tom is doing it27．—Do you know _________ The Belt and Road Forum began?—On May 14th, 2017.A．that B．when C．if D．where28．I wanted to know_______. Because she was so hard-working.A．if will she be successful B．if she would be successfulC．if she will be successful D．if would she be successful29．—Do you know ________The Belt and Road Forum（一带一路"高峰论坛）began on May 14th, 2017?—Of course. Mary told me about it yesterday.A．that B．when C．if D．where 30．Linda said ________she would stay at home tomorrow.A．when B．that C．which D．who 31．—What did Mary tell you?—She said that she ________Xiangshan the next month.A．will visit B．is visiting C．would visit D．has visited 32．The teacher told us that the sun ________in the east.A．has risen B．rose C．rises D．will rise 33．—Did you see Julie at the party?—No, I didn't. But she said ________she would come.A．which B．when C．where D．/34．He said that light __________much faster than sound.A．travelled B．travels C．will travel D．is travelling 35．He said ________they ________go sightseeing the next week.A．that; will B．if; will C．when; would D．that; would36．I hope ________I can visit China some day.A．if B．when C．that D．which 37．I believe ________Jenny will come to help me.A．which B．that C．when D．where 38．—I don't know ________the girl is.—She's Linda's sister.A．what B．where C．who D．which 39．—I don't know __________Kate will come or not.—I think she will if she has time.A．when B．that C．what D．whether 40．I'm quite busy. I don't know or not I will have time tonight.A．if B．whether C．weather41．I wonder ____________.A．if the program Readers is popularB．how does the program Readers succeedC．when did the program Readers beginD．whether is the program Readers popular42．Who do you think ____________us a talk this afternoon?A．to give B．gave C．will give D．giving 43．The girl students are discussing ____________the walls in the classroom.A．what to paint color B．to paint what colorC．which color to paint D．to paint which color44．—Could you tell me __________every morning?—Sure. Because I have to catch the school bus.A．why you get up early B．why do you get up earlyC．why did you get up early D．why you got up early45．—Can you explain_____________?—Firstly, be careful when you do it. And secondly, don't give it up.A．what to do B．what to do it C．how to do D．how to do it 46．—Excuse me. Could you tell me _____________ about the local history and culture?— Of course. You can check it on this computer.A．how can I get the information B．what information did I getC．where I can get the information D．that I got the information 47．— Could you please tell me _________________?— He lives in Wiuhan.A．where Zhong Wei lives B．where Zhong Wei livedC．where does Zhong Wei live D．where did Zhong Wei liveDo you know _________________?A．where is tea produced in ChinaB．if has Tina read Treasure IslandC．how often the zipper is used in our daily livesD．what's the Chinese story No Wa Repairs the Sky about48．—Could you please tell me _____________ yesterday?—In a shop near my home.A．where you buy the dictionary B．where do you buy the dictionary C．where you bought the dictionary D．where did you buy the dictionary 49．— Do you know ___________ the meeting?— Tomorrow morning,A．when they had B．when they are going to have C．when did they have D．when are they going to have答案解析部分1．A2．B3．B4．D5．B6．B7．D8．D9．D10．D11．C12．A13．C14．A15．B16．B17．A18．A19．A20．C21．C22．D23．D24．C25．C 26．C 27．B 28．B 29．A 30．B 31．C 32．C 33．D 34．B 35．D 36．C 37．B 38．C 39．D 40．B 41．A 42．C 43．C 44．A 45．D 46．C 47．A C 48．C 49．B初二英语：宾语从句专题第一部分:1-50 专项练习第二部分:51-100全面解析1．—Dad, can you tell me __________ to the amusement park?—The day after tomorrow.A．when we are going B．when we wentC．when are we going D．when did we go全面分析：——爸爸，你能告诉我我们什么时候去游乐园吗？——后天。

宾语从句讲解一、概念宾语从句的宾语部分中有一个从句充当宾语。

二、可接宾语从句的动词say 、tell 、think、know、see、hear、hope、guess、find、feel 等，或由形容词构成的系表结构，如：afraid、sure、glad、sorry等三、宾语从句的标点符号。

宾语从句的标点符号取决于主句，如果主句是陈述句，句尾用句号；如果主句是疑问句，句尾用问号。

四、引导词。

1、that （从句是陈述句时，引导词用that ，它本身无词义，不充当成分，在口语中可省略，但在正式场合不可省。

）2、if或whether （从句是一般疑问句时用if 或whether ，含义是“是否”。

）if、whether 一般情况下可以互换，但在构成whether…or not 句式只用whether3、连接代词、连接副词（从句是特殊疑问句时用）连接代词（what、which、who、whose ）连接副词（when、where、how 、why ）五、宾语从句的同义句转换。

在宾语从句中经常会出现“疑问词+动词不定式”的结构，它可与“疑问词+主语+情态动词+动词原形”进行同义句转换。

Can you tell me how I can get to the station？Can you tell me how to get to the station？六、宾语从句的语序。

宾语从句的语序都用陈述句语序（即正常的主谓语序）He says that Jim will miss a lot of lessons .He asked whether we should hold a sports meeting .Do you know what the population of Dalian is ？七、宾语从句的时态。

1、主句是一般现在时，从句可根据需要选用任何时态。

He says that he is good at EnglishHe says that he has been ill for two daysI don’t know if he will come tomorrow2、主句是一般过去时，从句可根据需要用相应的过去某种时态。

初二宾语从句专项练习题宾语从句是指在复合句中充当宾语的从句。

宾语从句的引导词有很多种，如：that, whether, if, what, when, where, why, who, whom, whose, which等。

宾语从句在日常交流和写作中使用频率较高，因此熟练掌握宾语从句的使用方法对于提高语言表达能力非常重要。

以下是一些初二宾语从句的专项练习题，帮助同学们加深对宾语从句的理解和运用。

1. — Do you know ______? I haven't seen him for a long time.— Sorry, I have no idea.A. whether he will comeB. that he will comeC. where he will comeD. if he will come2. — Can you tell me ______? My computer is not working.— I am not sure. Maybe you should ask a technician.A. how can I fix itB. how I can fix itC. where can I fix itD. where I can fix it3. — Could you tell me ______?— Sure, I will check it for you.A. what time is itB. what is the timeC. what time it isD. what is time4. My mom asked me ______.A. when will I finish my homeworkB. when I will finish my homeworkC. when did I finish my homeworkD. when I did finish my homework5. — Excuse me, do you know ______?— Yes, she works in the bookstore.A. whose bike is thisB. whose bike this isC. who bike this isD. who bike is this6. — Can you tell me ______?— Sorry, I didn't pay attention just now.A. where is your sisterB. where your sister isC. where your sister goD. where does your sister go7. The teacher asked the students ______.A. why they didn't finish their homeworkB. why didn't they finish their homeworkC. why they don't finish their homeworkD. why don't they finish their homework8. — Would you like to join us for dinner tonight?— I'm sorry, but I'm not sure ______ I can make it.A. ifB. whetherC. thatD. what9. — Have you decided ______ for your summer vacation?— Yes, I will go to the beach.A. what you will doB. what will you doC. you will do whatD. you will do what10. — Can you tell me ______?— She is a famous actress.A. who is sheB. who she isC. how is sheD. how she is以上是初二宾语从句的一些专项练习题，希望通过这些练习能够帮助同学们巩固对于宾语从句的掌握。

宾语从句（单选题 30题含解析）初中英语专题练习1．The teacher told us _____________ the earth moves around the sun.A. whetherB. ifC. whoD. that2． I hope you do not mind my asking, but I wonder ____________ it may be possible for me to share the room with you.A. thatB. ifC. whichD. how3． You should stick to ________ you have begun.A. wheneverB. no matter whatC. sinceD. whatever 4．____ Tom didn’t go to school?A. Do you know howB. How you know whyC. Why do you knowD. Do you know why5．—Could you tell me ________ you did it so well?—With my parents’ help.A. whoB. howC. whenD. what6． I never doubt _________ his advice is of great value to me.A. thatB. whetherC. howD. what7．—The project is so difficult for your cousin.—Yes, I am wondering ___________.A. that he will finish it on time.B. how could I help him outC. whether he can finish it by himselfD. if can I do anything for him8．The boy who was curious about everything asked his father ________.A．how life would be like in the year 2100B．which room he would live in the hotelC．how he called the man in a black suitD．if Shakespeare was a great writer of English literature9．—Do you believe _____________ man can live on Mars in the future.—It’s hard to say. Scientists are still not sure _____________ we can grow plants on Mars.A. if；thatB. whether；ifC. that；thatD. that；whether10．—Could you please tell me _____________?—Let me see. In twenty minutes.A. how often you go to your grandpa’s houseB. how soon the meeting will beginC. how long it takes from your home to school11．—Excuse me, can you tell me ________?—Sure. It’s next to the bo okstore.A．where is the bank B．where the bank is C．how is the bank D．how the bank is 12．—Excuse me, I wonder __________ the plane can land on time.—Wait a minute, please. Let me check it out.A．if B．which C．that D．who13．— Could you tell me ________ now?— His mother says he is much better.A．where Will is B．what Will is C．how Will is D．who Will is14．—What did Miss Li ask?—She asked ________.A．why Tom is late again B．why is Tom late againC．Why Tom was late again D．why was Tom late again15．—How long does it take to get to the airport?—Forty minutes. But it’s foggy today. I’m not sure ________ the highway will close soon. A．whether B．when C．how D．why16．—Where do you think ________?—I guess they took it in Suzhou.A．was the photo taken B．the photo was takenC．did the photo take D．the photo took17．—It will be Tina’s turn to perform at the show soon, but I can’t find her. Do you know ________?—I met her in the washroom just now.A．where she went B．where did she go C．where she has gone D．where has she gone 18．—I just came back from Universal Beijing Resort(北京环球度假区). Can you guess ________? —I’ve no idea. But I’ve heard everything there is quite expensive.A．how many days I stayed thereB．when did I come back homeC．how much I paid for Harley Potter toys19．Students asked the scientist _________.A．how electricity gets to their house B．how does electricity get to their houseC．how electricity got to their house D．how did electricity get to their house20．The shop assistant asked me ________.A．which one will you choose B．which one would you chooseC．which one I would choose D．which one I will choose21．Could you tell me ________?A．how many students are there in your class. B．when will you leave for Beijing C．who has taken my red pen. D．how long that film started.22．I don't know ________ he will come tomorrow. ________ he comes, I'll tell you．A．if; Whether B．whether; WhetherC．if; That D．if; If23．—I wonder .—Someone who can make me a better person.A.when you often meet your friendsB.how you make your friends happyC.who you want to make friends withD.where you spend weekends with friends24．—Boy, your head teacher has set up a WeChat group. Could you tell me? —OK, I’ll teach you.It’s so easy.A.how I join itB.why he sets it upC.what it is used forD.when it was set up25．—Alice, could you tell me London?—Sure. Last Sunday.A.when Mr. Smith leftB.when Mr. Smith will leaveC.when did Mr. Smith leaveD.when will Mr. Smith leave26．—Do you know the meeting?—Tomorrow morning.A.when they hadB.when they are going to haveC.when did they haveD.when are they going to have27．—Tim, could you tell me to the U.S.?—Oh, yes. I went there last year.A.when did you goB.when will you goC.when you wentD.when you will go28．—The Shenzhou-13 manned spaceship has just come back from space. Do you know ________? —The journey lasted for six months. It shows China is making great progress in space exploration. A．where it landed on the earth B．how long it travelled in spaceC．when scientists sent it to space D．how many astronauts were in it29．—Do you know _____?—Sorry, I have no idea. I am looking for her, too.A．what is Linda B．what Linda is C．where is Linda D．where Linda is30．—Excuse me, could you wake me up if my friend _____ here?—Of course. But we still don’t know when your friend _____ .A．comes; will come B．comes; comesC．will come; comes D．will come; will come【参考答案】1． D 【解析】句意：老师告诉我们地球围绕着太阳转。

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八年级下册宾语从句讲解与练习宾语从句小口诀：宾语从句三注意，时态语序引导词;主句一般现在时，从句不需受限制；主句一般过去时，从句须用相应时；陈述句转化that引，一般疑问句用if/whether,特殊问句疑问词，引导词后陈述式。

一、基本讲解1 概念:在句中担当宾语的从句叫宾语从句，宾语从句可作谓语动词的宾语，也可做介词的宾语.eg,He said he was good at drawing。

（动词宾语)He asks him how long Mike has been down . (动词宾语)Miss Zhang is angry at what you said. (介词宾语）2。

连接词(1) 。

陈述句转化成宾语从句时，引导词用that，口语中常常省略。

e.g, She told me （that） she would like to go with us.（2）以 whether 或 if 引导的宾语从句, 主要用来引导一般疑问句意思或选择疑问句意思的宾语从句,从句同样是陈述语序eg， I want to know if /whether you have told the new to Li Lei 。

注意:一般情况下，whether 和if 可以互用, 但有些情况例外。