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宾语从句疑问语序
宾语从句疑问语序是指当宾语从句是疑问句时，疑问句的语序在宾语从句中的应用规则。
疑问句的语序通常是疑问词 + 助动词 / 系动词 + 主语 + 谓语，例如：“What are you doing?”、“Where is my book?”等等。
在宾语从句中，疑问句的语序可以分为两种情况：
1. 正常语序：疑问句的语序不变，例如：“She asked me what I was doing.”
2. 倒装语序：疑问句的主语和助动词 / 系动词交换位置，例如：“He doesn’t know where his keys are.”（where和are倒装）需要注意的是，如果疑问句中没有助动词 / 系动词，那么就需要使用助动词do / does / did来构成疑问句，例如：“I don’t know what you want.”（want前面需要加do）
掌握宾语从句疑问语序的规则可以帮助我们更准确地理解和运
用英语语法，同时也可以提高我们的阅读和写作能力。
- 1 -。
.宾语从句中引导词的用法在复合句中作主句的宾语，引导词有：连词：that (that 常可省略),whether, if代词：who, whose, what ,which副词：when ,where, how, why 等。
（一）that引导的宾语从句（在非正式场合that可以省略）可跟that从句做宾语的动词有：say, think, insist, wish, hope, demand, imagine, wonder, know, suppose, see, believe, agree, admit, deny, expect, explain, order, command, feel, dream, suggest, hear, mean, notice, prefer, request, require, propose, declare, report等。
例句：The boy believes that he will travel through space to other planets.注意事项：当主句谓语动词是think, believe, suppose, expect 等词，而宾语从句的意思是否定时，常把否定转移至主句表示。
例句：I don’t think it is right for him to treat you like that.在以下情况中that不能省略1.当句中的动词后接多于两个由that引导的宾语从句时，第一个that可省，但后面的that不可省。
例句：He said (that) you were too young to understand the matter and that he was asked not to tell you.2.当主句的谓语动词与that宾语从句之间有插入语时，that一般不可省。
例句：Just then I noticed, for the first time, that our master was wearing his fine green coat and his black silk cap.3.当that从句是双宾语中的直接宾语时，that不可省。
宾语从句的语序宾语从句是复合句中的一种从句类型，用来作为主句的宾语。
它通常由连接词引导，连接词包括“that, whether, if, who, whom, whose, which, what, when, where, why, how”等。
在英语语法中，宾语从句的语序有一些规则需要遵循。
一、陈述句1. 直接引语的语序：主语 + 谓语 + 陈述句宾语从句例如：He said, "I am going to the cinema."（他说：“我要去电影院。
”）→ He said that he was going to the cinema.（他说他要去电影院。
）2. 间接引语的语序：主语 + 谓语 + 宾语 + 动词 +关系代词 + 陈述句宾语从句例如：He told me, "I am going to the cinema."（他告诉我：“我要去电影院。
”）→ He told me that he was going to the cinema.（他告诉我他要去电影院。
）二、疑问句1. 疑问词作宾语从句的连接词时，语序是：主语 + 谓语 + 疑问词 + 陈述句语序例如：I don't know when he will arrive.（我不知道他何时到达。
）→ I don't know when he will arrive.（我不知道他何时到达。
）2. 疑问词不作连接词时，语序是：主语 + 谓语 + if/whether + 陈述句语序例如：She asked me, "Do you love me?"（她问我：“你爱我吗？”）→ She asked me if I loved her.（她问我是否爱她。
）三、祈使句1. 不使用连接词时，语序是：祈使句 + 陈述句语序例如：He ordered, "Leave the room immediately."（他命令：“立即离开房间。
宾语从句的语序英语
宾语从句在英语中通常采用陈述语序，即主语在前，谓语在后，与陈述句的语序相同。
但是，在某些情况下，为了强调从句中的某个词或短语，也可以采用特殊的语序。
以下是宾语从句中可能采用的语序：
1. 疑问词+ 主语+ 谓语：用于强调从句中的疑问词。
例如：
What he said is true. （他说的是真的。
）
2. 主语+ 谓语+ 疑问词：用于强调从句中的疑问词。
例如：
Do you know who I am? （你知道我是谁吗？）
3. 疑问词+ 谓语+ 主语：用于强调从句中的谓语动词。
例如：
What he said is true. （他说的是真的。
）
需要注意的是，在宾语从句中，通常不使用倒装语序。
即主语和谓语的位置不变，而不是将谓语放在主语之前。
宾语从句中的引导词和语序要点总结在宾语从句中，引导词的选择以及语序的安排对于句子的理解和表达起着至关重要的作用。
本文将对宾语从句中的引导词和语序的要点进行总结，并探讨它们在语法中的作用。
一、引导词的选择1. 引导词的种类在宾语从句中，引导词分为连词引导和连接代词引导两种。
连词引导包括：that、whether和if。
连接代词引导包括：what、who、whom、which和whose。
2. 引导词的选择原则选择引导词需要根据从句在句子中的成分来确定。
当宾语从句作为动词的宾语时，可以使用that、whether和连接代词引导。
例如：- I know that he is a doctor.（宾语从句作为know的宾语）- Can you tell me whether he is coming?（宾语从句作为tell的宾语）- I don't know what he wants.（宾语从句作为know的宾语）当宾语从句作为介词的宾语时，只能使用连接代词引导。
例如：- She talked to the boy whom we met at the party.（宾语从句作为to的宾语）二、语序的安排1. 陈述句语序：在宾语从句中，如果主句是陈述句，那么从句的语序将保持不变。
例如：- They said that he was a good student.2. 一般疑问句语序：在宾语从句中，如果主句是一般疑问句，那么从句的语序需要倒装。
例如：- Do you know whether he is coming?- Can you tell me if she has finished her homework?3. 特殊疑问句语序：在宾语从句中，如果主句是特殊疑问句，那么从句的语序将按照特殊疑问句的语序。
例如：- She asked me what time it was.4. 否定句语序：在宾语从句中，如果主句是否定句，那么从句的语序需要保持不变。
宾语从句中的陈述语序宾语从句-时态1·主句用一般现在时，从句可用任意时态。
2·主句用过去时，从句用过去某个时态。
3·主句用过去时，从句是真理时，只用一般现在时。
宾语从句-连接词1．连词that：只起连接作用，在从句中不作句子成分，也无词汇意义，在口语中或非正式文体中常被省略。
He knew（that）he should work hard．2．连词whether或if：它们起连接作用，在从句中不作句子成分，作“是否”解，口语中多用if。
Do you know whether he will ride here at 8 tomorrow morning？3．连接代词who，whom ，whose，what， which：它们起连接作用，作句子成分，各有其自己的意义。
The teacher asked the new student which class he was in？（which引导宾语从句，在从句中作定语，修饰class，意为“哪个”。
）4．连接副词when，where， why，how：起连接作用，分别作时间、地点、原因、方式状语，各有其自己的意义。
I wonder where he got so much money．对他从哪里弄到那么多钱我感到疑惑。
（where在从句中作地点状语，修饰got，意为“哪里；什么地方”。
宾语从句-类型一．陈述句充当宾语从句：陈述句充当宾语从句用that引导，that可以省略。
简单句：She was much better.Lily said.从句：Lily said that she was much better.(Lily 说她好多了)二．一般疑问句充当宾语从句：1．一般疑问句充当宾语从句用if 或whether引导，从句应采取陈述句的语序。
简单句：I wonder. Can Jack swim in such a wide river ?从句：I wonder whether Jack can swim in such a wide river.2. whether引导宾语从句时可以和if互换，但是下列情况只能用whether。
宾语从句中引导词的位置和语序宾语从句是英语中的一个重要语法结构，常用来作为主句的宾语。
而在宾语从句中，引导词的位置和语序则是需要我们了解和掌握的部分。
本文将详细介绍宾语从句中引导词的位置和语序。
在宾语从句中，常见的引导词有连接代词和连接副词。
接下来我们将分别讨论这两类引导词的位置和语序。
1. 连接代词连接代词包括“that、whether、who、whom、whose、which”等。
连接代词引导的宾语从句通常作为及物动词的宾语、介词的宾语或不及物动词的补语。
在宾语从句中，连接代词的位置可以是主句后面、宾语从句的开头或宾语从句的中间。
具体位置取决于强调的需要以及句子的逻辑关系。
a) 连接代词位于主句后面：例如：I know (that) he is a doctor.（我知道他是医生。
）这里的“that”引导的宾语从句作为动词“know”的宾语，连接代词位于主句后面。
b) 连接代词位于宾语从句的开头：例如：I wonder who will win the game.（我想知道谁将赢得比赛。
）位于宾语从句的开头。
c) 连接代词位于宾语从句的中间：例如：She told me what she had for lunch.（她告诉我她午餐吃了什么。
）这里的“what”引导的宾语从句作为动词“told”的宾语，连接代词位于宾语从句的中间。
需要注意的是，当连接代词在宾语从句中作为主语时，常常将从句中的谓语动词放在连接代词之后。
例如：What he said is true.（他所说的是真的。
）这里的“he said”作为主语，连接代词“what”在从句中作为主语，谓语动词“is”出现在连接代词之后。
2. 连接副词连接副词包括“where、when、why、how”等。
连接副词引导的宾语从句常常用来修饰动词或形容词。
在宾语从句中，连接副词的位置一般是宾语从句的开头或中间。
a) 连接副词位于宾语从句的开头：例如：He asked me where I live.（他问我住在哪里。
中的宾语从句的语序宾语从句是复合句中的一种，用来充当句子的宾语。
在汉语中，宾语从句的语序相对灵活，这给我们造成了一定的困惑。
本文将针对中的宾语从句的语序进行探讨，并给出一些相关的例子。
宾语从句在句子中的位置较为固定，通常位于谓语动词之后，充当整个句子的宾语。
而宾语从句的语序则与汉语的主谓宾的语序略有不同。
一、直接引语的语序在直接引语中，宾语从句通常保持着自然语序，即主语在前，谓语在后。
例如：1. 我知道他在哪里。
2. 他告诉我他不喜欢那本书。
3. 我看见她在偷偷笑。
从上述例子可以看出，直接引语的宾语从句在语序上并无特殊之处。
二、间接引语的语序在间接引语中，宾语从句的语序就需要根据引导词的不同而进行调整。
1. 引导词为“说”、“告诉”等动词时，宾语从句保持原样。
例如：他说：“我喜欢这个城市。
” → 他说他喜欢这个城市。
2. 引导词为“问”、“想知道”等动词时，宾语从句的语序需要改变。
例如：她问：“你几岁了？” → 她问我几岁。
3. 引导词为“不知道”、“不确定”等动词时，宾语从句通常使用陈述句的语序。
例如：我不知道他何时离开。
→ 我不知道他什么时候离开。
从上述例子可以看出，间接引语的宾语从句的语序在一定程度上受到了引导词的影响，需要进行相应的调整。
三、特殊情况下的语序除了上述提到的直接引语和间接引语的情况外，还存在一些特殊情况下的语序。
1. 教室里传来一阵笑声，我不知道发生了什么事情。
在这个例子中，宾语从句的语序是“什么事情发生了”，与常见的语序略有不同。
这是因为宾语从句作为整个句子的宾语，为了突出宾语从句的内容，特意将“什么事情发生了”置于句首。
2. 我突然意识到，我从未真正了解过他。
在这个例子中，宾语从句的语序是“我从未真正了解过他”，与常见的语序一致。
这是因为宾语从句作为整个句子的宾语，不需要特别突出其内容。
总的来说，宾语从句的语序相对灵活，但也受到语境和引导词的影响。
我们需要根据具体情况来确定宾语从句的语序，以确保整个句子的表达准确清晰。
宾语从句的语序什么是宾语从句？在英语中，宾语从句是由一个从句充当动词的宾语的句子。
宾语从句可以用来代替一个名词或名词短语，作为主句的宾语。
宾语从句通常由连接词引导，这些连接词包括：that、if、whether、who、what、which、whom、whose等等。
宾语从句可以出现在及物动词、形容词、副词和介词后面，充当这些词的宾语。
宾语从句的语序在宾语从句中，语序有一些特殊规则。
让我们来看一些常见的情况：1. 宾语从句作为动词的宾语当宾语从句作为一个动词的宾语时，通常遵循以下语序：主句：主语 + 动词 + 宾语从句例句： - He said that he was tired. - She knows who is coming to the party. - I believe what she said.2. 宾语从句作为形容词的宾语当宾语从句作为形容词的宾语时，通常遵循以下语序：主句：主语 + 动词 + 形容词 + 宾语从句例句： - It is important that she arrives on time. - I am not sure whether it will rain tomorrow. - I feel sorry that I couldn’t come to the party.3. 宾语从句作为副词的宾语当宾语从句作为副词的宾语时，通常遵循以下语序：主句：主语 + 动词 + 副词 + 宾语从句例句： - She asked where I was going. - He told me when to come to the meeting. - They are discussing how to solve the problem.4. 宾语从句作为介词的宾语当宾语从句作为介词的宾语时，通常遵循以下语序：主句：介词 + 宾语从句例句： - I am worried about what will happen. - She is interested in whether he will come. - They are talking about how to improve the situation.结论宾语从句在英语句子中起着重要的作用，可以代替一个名词或名词短语作为主句的宾语。
宾语从句的语序无论主句是陈述句还是疑问句，宾语从句都必须使用陈述语序，即“主句＋连词＋宾语从句（主语＋谓语＋……）”句式。
根据连接词在从句中所担任的不同成分，可分为以下四种：一）连接词＋谓语。
连接词在从句中作主语。
常见的连接词有：who，what，which等。
如：Could you tell me who knows the answer，please？你能告诉我谁知道答案吗？The small children don't know what is in their stockings．这些小孩子不知道袜子里有什么东西？练习1. I don’t feel very well. Mum asked me ________ this morning.A. what the matterB. what is wrongC. what was the matterD. what wrong was练习2.Could you tell me ____?A. where is the post officeB. who knows the answerC. what are they doingD. when does the shop openKEY: 1.C 2.A二）连接词＋名词＋谓语。
连接词在从句中作主语的定语。
常见的连接词有：whose，what，which，how many，how much等。
如：He asked whose handwriting was the best in our class．他问我们班上谁的书法最好。
The teacher asked us how many people there were in the room．老师问我们房间里有多少人。
三）连接词＋主语＋谓语。
连接词在从句中作宾语、状语或表语。
常见的连接词有：who（m），what，which，how many，how much，when，why，how，where，if ／whether（在句中不充当任何成分）等。
宾语从句中的陈述语序宾语从句-时态1·主句用一般现在时，从句可用任意时态。
2·主句用过去时，从句用过去某个时态。
3·主句用过去时，从句是真理时，只用一般现在时。
宾语从句-连接词1．连词that：只起连接作用，在从句中不作句子成分，也无词汇意义，在口语中或非正式文体中常被省略。
He knew（that）he should work hard．2．连词whether或if：它们起连接作用，在从句中不作句子成分，作“是否”解，口语中多用if。
Do you know whether he will ride here at 8 tomorrow morning？3．连接代词who，whom ，whose，what， which：它们起连接作用，作句子成分，各有其自己的意义。
The teacher asked the new student which class he was in？（which引导宾语从句，在从句中作定语，修饰class，意为“哪个”。
）4．连接副词when，where， why，how：起连接作用，分别作时间、地点、原因、方式状语，各有其自己的意义。
I wonder where he got so much money．对他从哪里弄到那么多钱我感到疑惑。
（where在从句中作地点状语，修饰got，意为“哪里；什么地方”。
宾语从句-类型一．陈述句充当宾语从句：陈述句充当宾语从句用that引导，that可以省略。
简单句：She was much better.Lily said.从句：Lily said that she was much better.(Lily 说她好多了)二．一般疑问句充当宾语从句：1．一般疑问句充当宾语从句用if 或whether引导，从句应采取陈述句的语序。
简单句：I wonder. Can Jack swim in such a wide river ?从句：I wonder whether Jack can swim in such a wide river.2. whether引导宾语从句时可以和if互换，但是下列情况只能用whether。
英语宾语从句的语序训练及解析及解析一、选择题1．—Excuse me, could you tell me ________?—Certainly. Go along the street and you will find it on the left.A．why I can go to the bank B．why can I go to the bankC．how can I go to the bank D．how I can go to the bank2．—Peter, do you want to know something about Barcode（条形码）?—Yes, I am wondering ________.A．how old is the great invention B．who came up with this codeC．that it can be used in the library D．what information does a Barcode include. 3．—Do you know ________?—Yes. Next wee k. I’m preparing for it.A．when will we have the singing competitionB．when we will have the singing competitionC．where will we have the singing competitionD．where we will have the singing competition4．—Can you tell me ________ for the summer vacation?—Why not volunteer at the museum?A．what I should do B．what should I do C．when I should do D．when should I do 5．—Could you tell me________?—Once a month.A．how often do you go to the supermarketB．how often you go to the supermarketC．how soon will you go to the supermarketD．how soon you will go to the supermarket6．— I am worried about ________.—Whatever the result is, don’t be too hard on yourself.A．how can I pass my driving test B．which high school will I enter C．whether I can get great grades in the final exam D．when can I catch up with the top students7．—I’ve just received a Wechat message—“ttyl”. Do you know ________?—It stands for “talk to you later”.A．how does it mean B．how it meansC．what does it mean D．what it means8．— Could you tell me ________?— Yes. I bought it online.A．where do you buy the sweater B．where you buy the sweaterC．where did you buy the sweater D．where you bought the sweater 9．—Amy, I wonder ________ in the street when I come to pick you up.—Well, there’s a big tree by the front gate and it’s covered in lovely white flowers at the moment. A．how will I find your house B．how I will find your houseC．when I will find your house D．when will I find your house10．-Excuse me, I'm afraid we're lost. Could you tell us __________?-Sure. Go along the street for about 15 minutes, and then you'll see it.A．how can I get to Wanda Shopping Mall B．where Wanda Shopping Mall is C．how far is Wanda Shopping Mall D．where is Wanda Shopping Mall 11．—Can you tell me ________ this term?—On September 21st.A．when will the school trip be B．when the school trip will be C．where will the school trip be D．where the school trip will be 12．Hi, Jim. I hear that you’ve just come back from Sanya. I’m calling to ask ________. A．how did you visit the city B．h ow many days you’ve spent there C．which hotel have you stayed in Sanya D．how you found the seafood there 13．—Excuse me, could you tell me ________?—Better walk there. It’s only about ten minutes’ walk.A．how far Tianle Lake is B．which is the way to Tianle Lake C．how I can get to Tianle Lake D．how can I get to Tianle Lake 14．—It’s so crowded in the shop today. Do you know ________?—It’s said that there is a special offer on the milk.A．who is coming to the shop early B．when the shop opens the door C．where is the check-out counter D．why there are so many people 15．Mr Wang asked Tom _______.A．what was matter with him B．what is wrong with himC．what was the matter with him D．what the matter was with him 16．— Do you know ________?— At 8:00 next Monday morning.A．when the sports meeting began B．when did the sports meeting begin C．when will the sports meeting begin D．when the sports meeting will begin 17．—Why did Miss Wang look so worried when we saw her?—Because she wanted to know ________.A．where did the other students go B．when would the policeman come C．what her students have done during the trip D．if her students were hurt in the accident 18．Yesterday little Brian asked his teacher ________.A．when did light travelled faster than soundB．how light travelled faster than soundC．why light travels faster than soundD．when light travelled faster than sound19．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 meal20．--- Judy, could you tell me_______the schoolbag?--- Oh, yes. I bought it in a store on the Internet.A．where did you buy B．where will you buyC．where you bought D．where you will buy21．Tom was not listening carefully, so he failed to hear ________.A．what the teacher said B．how the teacher saidC．what did the teacher say D．how did the teacher say22．— I wonder ________.— Why not?A．that you’d like to come with us B．whether you’d like to come with us C．when would you like to come with us D．how would you like to come with us 23．—Could you please tell me ________ for travelling this summer?—We plan to go to the Great Wall.A．how will your family go B．how your family will goC．where your family will go D．where will your family go24．—Ann, could you tell me ________ yesterday?—Oh, I went to the supermarket for shopping near my home.A．where did you go B．when you went C．who you will go with D．where you went 25．—Could you please tell me _________ ?—Well, I always write e-mails to my pen pals.A．how do you learn Chinese B．what is your pen pal’s hobbyC．what do you do after class D．how you improve your writing26．I wouldn’t like to go to the library this Sunday, and I wonder ________.A．whether you can go with me B．that you can go with meC．whether can you go with me D．can you go with me27．I want to know more about Hong Kong. Can you tell me ________?A．when did it return to China B．when it returned to ChinaC．when does it return to China D．when it returns to China28．—I seem to be lost . Could you tell me ________ ?—Sure. You can take the No. 3 bus to get there.A．where is the nearest hospitalB．how long it will take me take me to the airportC．how I can get to the Xishan MuseumD．how far is my trip to the shopping center29．—Have you ever heard about the new law against food waste? I’m wondering ________. —Don’t worry. Of course it will.A．will it be helpful B．how will it be helpfulC．it will be helpful D．whether it will be helpful30．—When will Mr Liu come back to Zhenjiang?—Sorry, I don’t know ________.A．how long he will stay in Xinjiang B．how he went to XinjiangC．how soon will he be back from Xinjiang D．why he is going to Xinjiang 31．—Excuse me, can you tell me ________?—Sorry, I don’t know. You can go to the information desk.A．that there is a train B．when the train leavesC．where does the train go D．which train can I take 32．—Dave, could you tell me ________?—Go straight and turn right at the first crossing.A．how can I get to Renmin Square B．how I can get to Renmin Square C．when can I get to Renmin Square D．when I can get to Renmin Square 33．—Kate, I’m going to a party tonight. Could you please tell me _______?—With pleasure. Wait a moment, please.A．if the skirt looked nice on me B．what should I pay attention to C．that I should take some flowers D．how I can order “Didi” online 34．Hi, Peter. I’ve taken some photos of Shanghai and you can see ________.A．what it looks like B．how does it look likeC．how it looks like D．what does it look like 35．—Daming, do you know ________?—The strange shapes of its tall rocks.A．how large Zhangjiajie is B．what is Zhangjiajie famous for C．how large is Zhangjiajie D．what Zhangjiajie is famous for 36．Could you please tell me ________? I want to borrow some books.A．where is the library B．where the library isC．where was the library D．where the library was37．—Miss Liu, can you tell me ________?—We get together to enjoy the moon and eat moon cakes.A．why do you like the Chinese New Year bestB．how do you celebrate the Mid-Autumn FestivalC．how Chinese people celebrate the Chinese New YearD．what Chinese people do on the Mid-Autumn Festival38．—What did the teacher say just now?—He asked me _________.A．how could I work it out B．when did I go to the library C．why I looked unhappy then D．who I am waiting for39．—Jim is planning a trip to Shanghai this weekend, but still doesn’t decide________. —Why not take the high-speed railway? It’s fast and comfortable.A．who will he visit B．what he will doC．how he’s going there D．whom is he going with 40．—What did Mary say to you just now, Alan?—She asked ________.A．if I could go to the museum with her tomorrow B．why I am so sad todayC．who did I play volleyball with after school D．what will I do on the weekend【参考答案】一、选择题1．D解析：D【详解】句意：——打扰一下，你能告诉我怎样到银行吗？——当然，沿着这条街走，你就会在左边找到银行。
宾语从句中的陈述语序宾语从句-时态1·主句用一般现在时，从句可用任意时态。
2·主句用过去时，从句用过去某个时态。
3·主句用过去时，从句是真理时，只用一般现在时。
宾语从句-连接词1．连词that：只起连接作用，在从句中不作句子成分，也无词汇意义，在口语中或非正式文体中常被省略。
He knew（that）he should work hard．2．连词whether或if：它们起连接作用，在从句中不作句子成分，作“是否”解，口语中多用if。
Do you know whether he will ride here at 8 tomorrow morning？3．连接代词who，whom ，whose，what， which：它们起连接作用，作句子成分，各有其自己的意义。
The teacher asked the new student which class he was in？（which引导宾语从句，在从句中作定语，修饰class，意为“哪个”。
）4．连接副词when，where， why，how：起连接作用，分别作时间、地点、原因、方式状语，各有其自己的意义。
I wonder where he got so much money．对他从哪里弄到那么多钱我感到疑惑。
（where在从句中作地点状语，修饰got，意为“哪里；什么地方”。
宾语从句-类型一．陈述句充当宾语从句：陈述句充当宾语从句用that引导，that可以省略。
简单句：She was much better.Lily said.从句：Lily said that she was much better.(Lily 说她好多了)二．一般疑问句充当宾语从句：1．一般疑问句充当宾语从句用if 或whether引导，从句应采取陈述句的语序。
简单句：I wonder. Can Jack swim in such a wide river ?从句：I wonder whether Jack can swim in such a wide river.2. whether引导宾语从句时可以和if互换，但是下列情况只能用whether。
