初中状语从句的讲解PPT精品文档

1、1状语从句状语从句专项复习专项复习2 时间时间状语从句状语从句原因原因状语从句状语从句地点地点状语从句状语从句目的目的状语从句状语从句结果结果状语从句状语从句条件条件状语从句状语从句让步让步状语从句状语从句比较比较状语从句状语从句方式方式状语从句状语从句状语从句有九种，状语从句有九种， 时地原因条状补，时地原因条状补，目比结果方让步，目比结果方让步，连词引导各不同；连词引导各不同；主句通常前面走，主句通常前面走， 连词引导紧随后，连词引导紧随后，从句若在主前头，从句若在主前头， 主从之间有个逗。主从之间有个逗。31.While I was wondering at this, our scho

2、olmaster took his place. ( )2. Where there is a will, there is a way. ( )3. Now that/Since everybody is here, lets begin our meeting. （ ）4. Ill speak slowly so that you can understand me. ( )5. So clever was he a student that he was able to work out all the difficult problems. ( )6. As long as you d

3、ont lose heart, youll succeed. ( )7. Try as he might, he could not find a job. ( )8. The old lady treats the boy as if he were her own son. ( ) 时间时间地点地点原因原因目的目的结果结果条件条件让步让步方式方式4引导词可分为两部分引导词可分为两部分 when as while before after until (till) since as soon asevery timenext timethe first/last timethe moment

4、the minuteinstantlyimmediatelydirectly(一一就就)5becausesinceasfornow thatconsidering (that)seeing (that)既然既然考虑到鉴于考虑到鉴于鉴于由于既然因为鉴于由于既然因为6where/ wherevere.g. Wuhan lies where the Yangtze andthe Han River meet. so that in order that in case for fear that (生怕，以免）生怕，以免） lest7 ）though/ although even if/ even

5、though（尽管，虽然）（尽管，虽然）（即便）（即便）though/ although主句前可用主句前可用yet,常省略常省略e.g. Though it sounds strange, yet it istrue.倒装句倒装句和和独立副词放句末独立副词放句末只能用只能用though8e.g. Strange though it may seem, heremained single all his life. It was hard work. I enjoyed it, though.(但是不过）但是不过） whoever/no matter who whatever/ no matte

6、r what whenever/ no matter when 9e.g. Late as it was, they kept on working. Child as he is, he knows a lot. Much as I admire his father, I dontlike John. Try as you may, you might fail as well. Borrow the book as you may, you must return it on time.）as倒装倒装“虽然尽管虽然尽管”10than / as从句中常有成分省略从句中常有成分省略e.g.

7、The project was completed earlierthan (it was) expected. He worked as fast as a skilled worker(worked). Repeat this as often as (it is )necessary. Then see a doctor as soon as (it is)possible.11asas if/ as though依照如像依照如像仿佛仿佛/就象就象似的似的e.g. There black people had equal rightsand were free to live, stud

8、y and work as they wished.He kept working as if/ as thoughnothing had happened.1213 1、各种从属连词的含义及用法、各种从属连词的含义及用法 比较；比较；2、no matter wh- 与与 wh-ever 引引 导的从句的区别；导的从句的区别；3、状语从句的时态问题；、状语从句的时态问题；4、状语从句倒装及紧缩问题；、状语从句倒装及紧缩问题；5、状语从句与其它从句的区别。、状语从句与其它从句的区别。考点考点难难点点141. 时间状语从句时间状语从句1. (04北京春) We were swimming in t

9、he lake _ suddenly the storm started. A. when B. while C. until D. before2. (02上海) He was about to tell me the secret _ someone patted him on the shoulder. A. as B. until C. whileD. when3. (05上海) He transplanted the little tree to the garden _ it was the best time for it. A. where B. when C. thatD.

10、until4. (05福建) Did Jack come back early last night? Yes. It was not yet eight oclock _ he arrived home. A. Before B. when C. that D. until5. (06辽宁) He was about halfway through his meal _ a familiar voice came to his ears. A. why B. where C. when D. whileA AD DB BB BC C156. (06天津天津) The cost of livi

11、ng in Glasgow is among the lowest in Britain, _ the quality of life is probably one of the highest. A. since B. when C. as D. while7. (04年江苏年江苏) _ I accept that he is not perfect, I do actually like the person. A. While B. Since C. Before D. Unless连接词while的用法小结 1. while引导的动作必须是持续性的，侧重主句动作和从句动作相对比。如：

12、 Please dont talk so loud while others are working. 2. while作为并列连词，意为“而，却”，表示对比。 3. while可表示尽管，相当于although。D DA A16问题问题3:1. (01北京春北京春)Did you remember to give Mary the money you owed her? Yes. I gave it to her _ I saw her. A. whileB. the moment C. suddenlyD. once2. (1998上海上海) I thought her nice and

13、honest _ I met her. A. first time B. for the first time C. the first timeD. by the first time3. _ entered the office when he realized that he had forgotten his report. A. He hardly had B. Had he hardly C. Hardly had heD. Hardly he had B BC CC C17小结：小结：1一些词，如一些词，如the moment, the minute, the instant,

14、immediately, directly, instantly, hardlywhen, scarcelywhen, no soonerthan等也可引导一个时等也可引导一个时 间状语从句，相当于间状语从句，相当于as soon as的意思。的意思。 I didnt wait a moment, but came immediately you called.2一些含有一些含有time的名词短语，如的名词短语，如every time, each time, next time, by the time等，以及等，以及the day, the year, the morning等，也可引导一个

15、时间状语从句。等，也可引导一个时间状语从句。 The day he returned home, his father was already dead. Next time you come, please bring your composition.3. 如果如果hardly或或no sooner或或scarcely置于句首，句子必置于句首，句子必 须用部分倒装结构。须用部分倒装结构。 Hardly had I got home when it began to rain.18问题问题4:1. (03北京春北京春) Was his father very strict with him

16、when he was at school? Yes. He had never praised him _ he became one of the top students in his grade. A. after B. unless C. until D. when2. (03上海上海) A good storyteller must be able to hold listeners curiosity _ he reaches the end of the story. A. when B. unless C. after D. until3. It was not _ she

17、took off her dark glasses _ I realized she was a famous film star. A. when; that B. until; that C. until; when D. when; thenC CD DB B19连接词before的小结：一、含义1 We had sailed four days and four nights before we saw land.2 We hadnt run a mile before he felt tired.3 Please write it down before you forget it.

18、4Before I could get in a word, he had measured me. “才” “不到就” “趁” “还没来得及” 二Before从句中谓语不用否定式。如： Before they reached the station, the train had gone. 三1）句型It will be/was段时间before“还要过多久才” 如：It will be two years before he leaves the country. 2）句型It will be/was not一段时间before“不多久就” 如： It wasnt two years be

19、fore he left the country. 3）句型It is段时间since时间的计算一律从since从句的 动作完成或状态结束时算起。如： It is three years since she was in the army. It is three years since she joined the army. 20 2、条件状语从句、条件状语从句问题问题1：1、The WTO cannot live up to its name _ it does not include a country that is home to one fifth of mankind. （20

20、00全国）全国）Aas long as BwhileCif Deven though2、 It is known to all that _ you exercise regularly, you wont keep good health. （05重庆卷）重庆卷） A. unless B. whenever C. although D. if C CA A unless 相当于相当于 if not，意思是，意思是“除非除非”“如果不如果不就就”。这。这也是高考的热点之一。复习时也应给予高度重视。也是高考的热点之一。复习时也应给予高度重视。21问题问题2：1、_ I can see, ther

21、e is only one possible way to keep away from the danger. （04北京春季）北京春季） A. As long as B. As far as C. Just as D. Even if 2、I always take something to read when I go to the doctors _ I have to wait. （05全国卷全国卷3） Ain case Bso that Cin orderDas if B BA A as long as 与 as far as 都可引导条件状语从句，as long as 表示“只要

22、”，as far as 表示“就而论（而言）”。题1根据题意应该选用B。in case 表示“以防”，根据题2的句意，不难作出选择。223、让步状语从句、让步状语从句问题问题1： 1、 _ I accept that he is not perfect, I do actually like the person. （04江苏）江苏） A. While B. Since C. Before D. Unless2、Allow children the space to voice their opinions, _they are different from your own. (05湖南卷）

23、湖南卷） A. untilB. even ifC. unless D. as though A AB B while 是高考中的高频词，它既可引导时间状语从句，又可引导并列句，还可引导让步状语从句，表示“尽管”。even if 等于 even though，表示“即使、尽管”。as though 等于 as if，引导方式状语从句，表示“好像、似乎”。23问题问题2： 1、 He tried his best to solve the problem, _ difficult it was. （05天津卷）天津卷） A. however B. no matter C. whatever D a

24、lthough 2、The old tower must be saved, _the cost. （05浙江）浙江） Ahowever Bwhatever Cwhichever Dwherever A AB Bno matter wh- 与 wh-ever 的联系及区别：no matter wh- 只引导让步状语从句，此时与 wh-ever通用。如: No matter when / Whenever he comes back, he should be invited to the party.wh-ever又可引导名词性从句， No matter wh-不能。如：Whatever I

25、can do for you will be nothing but paying a debt. Whoever can help us will be welcome.244. 状语从句的时态问题状语从句的时态问题问题问题1：1、The house could fall down soon if no one_ some quick repair work. （04全国全国IV） A has done B is doing C does D had done 2、It is almost five years _ we saw each other last time. （05北京春季）北

26、京春季）A. before B. since C. after D. when 在条件，时间和让步从句中，用一般现在时表示一般将在条件，时间和让步从句中，用一般现在时表示一般将来时，用现在完成时表将来完成时，用一般过去时表过去将来时，用现在完成时表将来完成时，用一般过去时表过去将来时。在来时。在 since 引导的时间状语从句中，动词一般都用一般引导的时间状语从句中，动词一般都用一般过去时，而主句常用现在完成时。过去时，而主句常用现在完成时。C CB B255、状语从句的倒装问题、状语从句的倒装问题问题问题1：1、So difficult _ it to live in an English-

27、speaking country that I determined to learn English. (01 上海上海) A. I have felt B. have I felt C. I did feel D. did I feel2、Not until all the fish died in the river _ how serious the pollution was. (95 NMET) A. did the villagers realize B. the villagers realized C. the villagers did realize D. didnt t

28、he villagers realize 状语从句的倒装一般有下面几种情况：状语从句的倒装一般有下面几种情况： 否定词开头；否定词开头； so 加加 adj. 开头；开头； as / though引导的让步状语从句。引导的让步状语从句。D DA A26 Hardly when No sooner than Child as he is, Hardly had he got to the station when the train left. No sooner had he got to the station than the train left. Child as he is, he

29、can speak seven foreign languages。276、状语从句与并列句的区别、状语从句与并列句的区别问题问题1：1、Though he is in his sixties, _ he works as hard as a young man A. yet B. but C. and D. and yet2、 Excuse me for breaking in, _ I have some news for you. (NMET02) A. so B. and C. but D. yet 题题1是主从复合句，所以中间不能使用并列连词是主从复合句，所以中间不能使用并列连词 a

30、nd; or; but; so 等。等。yet 是副词，只有是副词，只有 yet 可以与可以与 though 连用。题为连用。题为并列句，而并列句，而“Excuse , but ”为一固定搭配。在复习中要为一固定搭配。在复习中要细心的分析句子结构和成分。细心的分析句子结构和成分。A AC C2829 1. We were about to leave_ it began to rain.2. She thought I was talking about her son, _, in fact, I was talking about my son.3. Hardly had I finish

31、ed my composition _ the bell rang. A. when B. while C. as D. during对比训练对比训练 A AB BA A301. Child _ she is, she knows a lot.2. He did the experient _ he was told.3. The pianos in the other shop will be cheaper, but not _ good. A. during B. as C. so D. though E. both B and C 对比训练对比训练 E EB BB B311. He w

32、ould have a look at the bookstores _ he went to town.2. We decide to finish the work on time, _ happens.3. If we work with a strong will, we overcome any difficulty, _ great it is.4. Ill give the book to _ likes English. A. whenever B. whoever C. whatever D. however对比训练对比训练 A AC CD DB B32对比训练对比训练 1.

33、 It will be years _ we meet again.2. It is ten years _ I came to this town.3. It is ten years ago _ I came to this town4.It is 1986_his first novel came out. A. when B. that C. before D. sinceC CD DB BA33对比训练对比训练 5 5 1.Go and get your coat. It is _ you left it.2. You are free to go _ you like. A. th

34、ere B. where C. wherever D. when B BC C341. The article is written in such easy English _ all of us can read it.2. The article is written in such easy English _ all of us can read. A. that B. which C. as D. so that 对比训练对比训练 6 6 C CA A35对比训练对比训练 7 7 1. If we work hard, we can overcome any difficulty,

35、 no matter _ great it is.2. If we work hard, we can overcome any difficulty, _ great it is.3. If we work hard, we can overcome any difficulty, _ difficulty it is.4. If we work hard, we can overcome any difficulty, no matter _ difficulty it is. A. what B. how C. however D. whateverB BC CD DA A36名词性从名

36、词性从句句专项复习专项复习37Noun Clause:Functions as a NOUN in a sentence. Question: What is the function of a noun in a sentence? 名词在句中可以充当什么成分名词在句中可以充当什么成分? ?38 名词性从句名词性从句 noun clause 主语从句主语从句subject clause 宾语从句宾语从句object clause 表语从句表语从句predicative clause 同位语从句同位语从句appositive clause39What kind of clauses are t

37、hey? What the driver of the yellow car did made me extremely angry. Why she did this is still unknown. Its hard to forget what we have learned in his classes. Please dont tell my mother when Ill give her my gift.40Thats why I cant follow you.The problem is that its very hard to catch your words.The

38、fact that he tells lies all the time makes us surprised.There is no doubt that it will rain tomorrow.41Im not sure whether you would like it or not.She felt very surprised that I finished it all by myself.I have no idea where he is.Please tell us the truth how many people were drowned in the flood.4

39、2The novel tells that the truth always takes the side of the majority of people.I cant explain why he behaves like that.How he finished doing that is not important.Where we will go hasnt been decided yet.43名词性从句考点名词性从句考点44名词性从句包括主语从句、宾语从句、表语从句和同位语名词性从句包括主语从句、宾语从句、表语从句和同位语从句从句.名词性从句一向是名词性从句一向是NMET中的重

40、要考点中的重要考点.通过对近几通过对近几年高考试题的分析年高考试题的分析,我们可以看出我们可以看出NMET名词性从句考点名词性从句考点主要有以下六个方面主要有以下六个方面: 考点之一考点之一:考查名词性从句中考查名词性从句中that与与what的区别的区别 考例考例: _ we cant get seems better than _ we have. A. What; what B. What; that C. That; that D. That; what 分析分析: 在名词性从句中在名词性从句中that与与what的区别是的区别是:that在在名词性从句中不作句子成分名词性从句中不作句

41、子成分,只起连接作用只起连接作用;而而what在名在名词性从句中不仅起连接作用词性从句中不仅起连接作用,而且作句子成分而且作句子成分.句子的意思句子的意思是是:我们不能得到的似乎比我们已经拥有的要好我们不能得到的似乎比我们已经拥有的要好.此题考查此题考查了两个名词性从句了两个名词性从句:主语从句和宾语从句主语从句和宾语从句,what在这两个在这两个名词性从句中都作宾语名词性从句中都作宾语. 45考点之二考点之二:考查名词性从句中的考查名词性从句中的it作形式主语或形式宾语作形式主语或形式宾语 考例考例1: _ is a fact that English is being accepted a

42、s an international language. A. There B. This C. That D. It 分析分析:在这种名词性从句中为了保持句子的平衡在这种名词性从句中为了保持句子的平衡,往往往往用先行词用先行词it作形式主语或形式宾语作形式主语或形式宾语,而把真正的主语或宾而把真正的主语或宾语放到后面语放到后面,尤其是尤其是that引导的主语从句往往用先行词引导的主语从句往往用先行词it作形式主语作形式主语.此句也可以改写为此句也可以改写为:That English is being accepted as an international language is a fac

43、t. 考例考例2: I hate _ when people talk with their mouths full. A. it B. that C. this D. them 分析分析:此题考查的是用先行词此题考查的是用先行词it作形式宾语作形式宾语,而把真正而把真正的宾语从句放到后面的宾语从句放到后面.其他几个词均不能作形式宾语其他几个词均不能作形式宾语. 46考点之三考点之三:考查名词性从句的语序考查名词性从句的语序 考例考例:The photographs will show you _ . A. what does our village look like B. what our

44、 village looks like C. how does our village look like D. how our village looks like 分析分析:在名词性从句中在名词性从句中,除了关联词要提到句首之外除了关联词要提到句首之外,一律一律要用陈述句语序。当关联词含疑问意义时要用陈述句语序。当关联词含疑问意义时,有的学生就会有的学生就会受习惯影响错误地使用疑问句语序。克服这种错误的关键受习惯影响错误地使用疑问句语序。克服这种错误的关键是要找准从句中的主语和谓语。本题句子的意思是是要找准从句中的主语和谓语。本题句子的意思是:这些这些照片会告诉你我们村子是什么样。本题中根

45、据引导词照片会告诉你我们村子是什么样。本题中根据引导词what要作介词要作介词like的宾语的宾语,而副词而副词how不能作介词不能作介词like的宾的宾语语,所以首先排除所以首先排除C、D,而而A项是疑问句语序项是疑问句语序,故只能选故只能选B。 47考点考点之四之四:考查名词性从句中的考查名词性从句中的whether, if以及以及that的区别的区别 考例考例1: _ well go camping tomorrow depends on the weather. A. If B. Whether C. That D. Where 分析分析:句子的意思是句子的意思是:我们明天是否去野营要

46、视天气而定我们明天是否去野营要视天气而定. whether与与if当当是否是否讲时的区别是讲时的区别是:在引导宾语从句时两者可以互在引导宾语从句时两者可以互换换,但在引导主语从句、表语从句和同位语从句以及介词后面的宾但在引导主语从句、表语从句和同位语从句以及介词后面的宾语从句或后面紧跟语从句或后面紧跟or not时通常只能用时通常只能用whether,而不能用而不能用if. 考例考例2: What the doctors really doubt is _ my mother will recover from the serious disease soon. A. when B. how

47、C. whether D. why分析分析:本题句子的意思是本题句子的意思是:医生真正怀疑的是我母亲是否能很快从重医生真正怀疑的是我母亲是否能很快从重病中恢复过来病中恢复过来.whether引导的是表语从句引导的是表语从句. 48考例考例3: It worried her a bit _ her hair was turning gray. A. while B. that C. if D. for 分析分析:本题句子的意思是本题句子的意思是:头发变白使她有点儿不安。头发变白使她有点儿不安。It作形式主语作形式主语,that引导的是主语从句。引导的是主语从句。whether, if以及以及th

48、at引导的名词性从句的区别是引导的名词性从句的区别是:whether与与if(当当是否是否讲时讲时)引导的名词性从句含有疑问意义引导的名词性从句含有疑问意义;而而that引导的名词引导的名词性从句不含有疑问意义。性从句不含有疑问意义。49考点之五考点之五:考查名词性从句中的疑问词考查名词性从句中的疑问词+ever引导的名词引导的名词性从句及其与性从句及其与no matter+疑问词引导的从句的区别疑问词引导的从句的区别 考例考例 1:It is generally considered unwise to give a child _ he or she wants. A. however B

49、. whatever C. whichever D. whenever 分析分析:本题句子的意思是本题句子的意思是:一般认为孩子要什么就给什一般认为孩子要什么就给什么是不明智的么是不明智的.whatever引导的是宾语从句引导的是宾语从句,A. however 和和D. whenever是不能作宾语的是不能作宾语的;而而C. whichever表示表示无无论哪一个、无论哪些论哪一个、无论哪些,表示在一定范围内的人或事物表示在一定范围内的人或事物,此此处并不涉及处并不涉及一定范围内的人或事物一定范围内的人或事物,所以也不能选所以也不能选. 50考例考例2: Sarah hopes to beco

50、me a friend of _ shares her interests. A. anyone B. whomever C. whoever D. no matter who 分析分析:本题句子的意思是本题句子的意思是:萨拉希望跟自己有共同爱萨拉希望跟自己有共同爱好的人交朋友好的人交朋友.疑问词疑问词+ever引导的名词性从句与引导的名词性从句与no matter+疑问词引导的从句的区别是疑问词引导的从句的区别是:前者既可以引导前者既可以引导名词性从句也可以引导让步状语从句名词性从句也可以引导让步状语从句;后者只能引导让后者只能引导让步状语从句步状语从句.首先排除首先排除D.而选而选A. a

51、nyone则应在其后加则应在其后加who.从句中需要的是主语从句中需要的是主语,所以所以whomever也不行也不行. 51考点之六考点之六:考查名词性从句的虚拟语气问题考查名词性从句的虚拟语气问题 考例考例:It is necessary that a college student _ at least a foreign language. A. masters B. should master C. mastered D. will master 分析分析:本题选本题选B.句子的意思是句子的意思是:大学生至少应该掌握一门外语。大学生至少应该掌握一门外语。It is necessary-

52、that 用用should的虚拟语气的虚拟语气.(1) 在主语从句中用来表示惊奇、不相信、惋惜、理应如此等在主语从句中用来表示惊奇、不相信、惋惜、理应如此等,谓语谓语动词用虚拟语气动词用虚拟语气(should) +do,常用的句型有常用的句型有:I. It is necessary (important, natural, strange, etc.) that. II. It is a pity(a shame, no wonder, etc.) that. III. It is suggested (requested, proposed, desired, etc.) that.如如:

53、It is strange that she (should) think so. 52(2) 表示建议、请求、命令、要求、坚持等及物动词后面表示建议、请求、命令、要求、坚持等及物动词后面的宾语从句中要用虚拟语气的宾语从句中要用虚拟语气,常用的这类动词有常用的这类动词有suggest, propose, insist, desire, demand, request, order, command等。如等。如: I insist that she (should) do her work alone. (3) 主语是主语是suggestion, proposal, request, decis

54、ion等等表示表示建议、请求、要求、决定等建议、请求、要求、决定等意思的词时意思的词时,表语从句表语从句中谓语动词要用虚拟语气中谓语动词要用虚拟语气(should) +do。如。如: His suggestion is that we (should) hold another meeting to discuss the question. 53(4) 表示表示建议、请求、命令、要求、决定等建议、请求、命令、要求、决定等意思意思的名词后面的同位语从句中谓语动词要用虚拟语的名词后面的同位语从句中谓语动词要用虚拟语气气(should)+do。如。如: They received orders t

55、hat the work(should)be done at once. 54名词性从句典型错误例析551. As is known to all that paper was first invented in China.析：析：that引导的从句是主语从句，用引导的从句是主语从句，用it作形式主语时，作形式主语时，应把应把as改为改为it，或者原句改为定语从句：，或者原句改为定语从句：As is known to all, paper was first invented in China.2. All the students went to see what the matter w

56、as with her.析：应把析：应把what the matter was改为改为what was the matter。what was the matter (with)和和what was wrong (with)作宾语从句时语序不变。作宾语从句时语序不变。3. We dont doubt whether he can do a good job.析：当谓语动词是析：当谓语动词是doubt时，应用时，应用whether/if引导宾语引导宾语从句，而从句，而do not doubt (= believe) 和疑问句中的和疑问句中的doubt用用that引导宾语从句，应把引导宾语从句，应

57、把whether改为改为that。564. Are the shoes that you bought yesterday?析：应把析：应把that改为改为what。that可用于名词性从句，但可用于名词性从句，但在从句中只能起连接作用，不充当任何成分。此句中在从句中只能起连接作用，不充当任何成分。此句中的的what引导表语从句，并在从句中作引导表语从句，并在从句中作bought的宾语，的宾语，相当于相当于the things which。5. The reason why I like the dictionary is because it is useful for my work.析：

58、析：The reason作主语，作主语，why引导定语从句，后面的引导定语从句，后面的表语从句习惯用表语从句习惯用that引导，应把引导，应把because改为改为that。576. This surprised us very much that Tom should have left without a word.析：应把析：应把this改为改为it。it作形式主语，引导主语从句，作形式主语，引导主语从句，而真正的主语是而真正的主语是that引导的从句。引导的从句。7. The question is if the film is worth seeing.析：析：whether可以引导

59、表语从句，而可以引导表语从句，而if不能用来引导表不能用来引导表语从句，应把语从句，应把if改为改为whether。8. The news came which our football team won.析：应把析：应把which改为改为that。同位语从句只能用。同位语从句只能用that来引来引导，不能用导，不能用which来引导。来引导。589. Where did they hold the important meeting is unknown to us all.析：名词性从句要用陈述句语序，主语从句析：名词性从句要用陈述句语序，主语从句Where did they hold t

60、he important meeting应改为应改为Where they held the important meeting。10. If the sports meet will be held depends on the weather.析：应把析：应把If改为改为Whether。whether引导主语从句，引导主语从句，if不能引导主语从句。不能引导主语从句。11. Who knows the truth will tell you about it. 析：应把析：应把Who改为改为Whoever。whoever相当于相当于anyone who。5912. It depends on