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高中英语条件状语从句全面解析

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这是一份高中英语条件状语从句全面解析，共12页。

高中英语专题：条件状语从句全面解析

1．If you come this afternoon, we_____ a meeting.

A．Would have B．have C．will have D．Has

全面解析：如果你今天下午来，我们将开个会。这是一个条件状语从句，遵循“主将从现”原则，故选C。

2．You won’t find paper cutting difficult _____you keep practicing it.

A．even if B．as long as

C．as if D．ever since

全面解析：只要你不断练习，你不会觉得剪纸很难。A.even though 即使，虽然; B.as long as 只要;C.as if 犹如．好像：D.ever since自从。结合句意，故选B

3．Video games can be a poor influence if ________ in the wrong hands.

A． to leave B．leaving C．leave D．left

全面解析：如果电子游戏落入一个错误的人手中就能够产生一个不良景晌。leave与其逻辑主语video games 之间是被动关系，故用过去分词。if left是状语从句的省略形式。所以答案选 D。

4．—I wonder if Professor Watson ________ the party tonight.

—I don't know，but I'll let you know if he ________.

A．will attend；will come B．will attend；comes

C．attends；will come D．attends；comes

全面解析：——想知道Watson教授今晚是否会参加这个聚会。——我不知道，但如果他来了我会告诉你的。第一个if引导的是宾语从句，根据句意宾语从句的谓语动词用一般将来时；第二个if 引导的是条件状语从句，遵循“主将从现”原则‘ ，故选B。

5．You shouldn't accept a lift from a person ________ you don't know him.

A．until B．unless C．if D．whether

全面解析：你不应该接受一个人搭车，如果你不了解他。 A. until直到…才；B. unless除非；C. if如果；D. whether是否。故选C。

6．Why not look up the new word in a dictionary_______you don't know it?

A．if B．that

C．though D．whether

全面解析：如果你不认识这个新单词，-为什么不查字典呢？if如果，引导条件状语从句。

7．—What are you going to do this afternoon?

—I'll probably go for a walk later on it stays fine．

A．as far as B．so long as C．even if D．as if

全面解析：——你今天下午要去干什么呢？——只要天气好，我可能稍晚些的时候去散步。A. as far as”远到，和……一样远“；B. so long as”只要“；C. even if”即使“；D. as if”仿佛“。根据句意可知，后句表示前句的一种条件。故选B。

8．Take the note as a reminder ______ you forgot to buy some sweets for the kids while shopping there.

A．how B．that C．in case D．even if

全面解析：以防你购物的时候忘了给孩子们买糖果，把这个便条留在身边。in case“以防”；even if“即使 ”。前后句为条件关系，故选C。

9．The rivers will become dirtier and dirtier ________ we take action to protect them.

A．since B．if C．until D．unless

全面解析：除非我们采取措施保护河流，不然他们会越来越脏。A. since “自从，由于”；B. if “如果，是否”；C. until “直到”；D. unless “除非”。根据前句说“河流越来越脏”，后半句说“我们采取措施保护他们”可知，填入unless引导条件状语从句符合题意。故选D。

10．—Will you go to the picnic tomorrow?

—Not my dear dog is allowed to accompany me.

A．if B．until C．unless D．when

全面解析：——你明天去野餐吗？——如果我的狗不允许陪伴着我的话我不去。原句表达为I will not go to the picnic tomorrow if my dog cannot accompany me.此处If not相当于unless"除非", 主句简化成了not，故选C。

11．Take short walks to calm down, or, _________, simply take a day off.

A．if necessary B．if not C．if ever D．if so

全面解析：考查短语词组，句意：散个短步冷静下来，或者如果有必要的话，就放一天假吧，if necessary如果有必要的话，if not如果不是，if ever如果曾经，if so如果这样的话，故选A。

12．Don't call me at the office ________ it is necessary.

A．before B．unless C．although D．till

全面解析：考查连词。句意：请不要打电话到我的办公室，除非是真的有必要。A. before在……以前；B．unless除非，引导条件状语从句；C. although尽管；D. till直到……为止。故选B。

13．— Where are we going for dinner?

— I don't mind where we go ________ there's my favorite food sushi.

A．in case B．as soon as C．now that D．so long as

全面解析：——我们去哪吃晚饭？——只要有我最喜欢的寿司，我不在乎去哪儿。A. in case“以防万一”；B. as soon as“一……就……”；C. now that“既然，由于”；D. so long as“只要”。故选D。

14．________ you can sleep well, you will lose the ability to focus, plan and stay motivated after one or two nights.

A．Once B．If C．Unless D．While

全面解析：除非你能睡好觉，否则在一两个晚上以后你会失去专注，计划和保持动力的能力。once“一旦”；if“如果”；unless“除非”；while“尽管”。unless表示在特定条件下，才会发生或者不发生一件事。句中you can sleep well是条件，you will lose the ability to focus, plan and stay motivated after one or two nights是前面这种条件下不会发生的事情，所以用unless来引导，故选C。

15．The game is not very difficult _______ you understand the rules.

A．until B．though C．once D．unless

全面解析：一旦你明白了规则，这个游戏就不难了。A. until直到—为止；B. though尽管；C. once一旦；D. unless除非。此处是once“一旦”引导的条件状语从句，故选C。

16．If ______ to look after luggage for someone else, inform the police at once.

A．asked B．to ask C．asking D．having asked

全面解析：如果被要求给别人照看行李，立刻通知警方。从语境中可知这里是被要求，当从句中的主语和主句主语一致时，且从句中有谓语动词，此时可以省略从句中的主语和谓语动词。此句中，主句为祈使句，主语为you,从句中省略了you are。故选A。

17．_____ you visit the website, you can find the information you need.

A．Although B．As long as C．Since D．Unless

全面解析：只要你登录这个网址，你就能找到你需要的信息A。Although “尽管”； B. As long as “只要”； C. Since“自从......以来”； D. Unless“除非”。故选B。

18．________ you exercise regularly as well, you won't be able to lose weight only by eating less.

A．Once B．When C．If D．Unless

全面解析：如果你不经常锻炼，只减少饮食，也不能减轻体重。A. Once“一旦”；B. When“当.....的时候”；C. If“如果”；D. Unless“如果不，除非”。分析句子可知，从句与主句属于条件关系，如果不经常锻炼，就不能减轻体重，故选D。

19．Magic shows are entertaining ______ the audience does not discover how the tricks are done.

A．so that B．as long as C．as if D．ever since

全面解析：只要观众没有发现魔术表演是怎么做的，魔术表演就很有娱乐性。A. so that“以便”；B. as long as“只要”；C. as if“似乎”；D. ever since“从那时起",此处表示条件，故选B。

20．This medicine is quite beneficial to your recovery after the operation, ________ you take it as told.

A．unless B．providing C．considering D．since

全面解析：考查状语从句。句意：这种药只要你按要求服用肯定有益于你手术后的恢复的。“providing…”可以用来引导条件状语从句表示“只要…”，符合语境，故B项正确。

21．All of our equipment dates back to the 1960s and 1970s; we cannot make products that compete with foreign products, _______ we can buy the necessary technology.

A．unless B．while C．once D．if

全面解析：我们所有的设备都可以追溯到20世纪60年代和70年代；除非我们能买到必要的技术，否则我们不能生产与外国产品相竞争的产品。unless“除非”；while '……时候，尽管”；once“一旦”；if“如果”。分析句子可知，本句为条件状语从句，所以应用表示条件的从属连词，故unless符合句意，选A。

22．If nothing ______, the oceans will turn into fish deserts.

A．is done B．has done C．will be done D．does

全面解析：如果什么都不做，海洋将会变成鱼的沙漠。因为主句是一般将来时，if引导的条件句用一般现在时，而条件句的主句是nothing，与谓语动词do之间应该是被动关系，故选A。

23．________ little chicks remain in the nest, they are completely dependent on their parents for food.

A．Even though B．As long as C．Until D．Unless

全面解析：只要小鸡待在巢里，它们就会完全依赖它们的父母获得食物。A. Even though“即使，纵然”；B. As long as“只要”；C. Until“直到”；D. Unless“除非”。故选B。
24．A man can fail many times, but he isn't a failure _______ he begins to blame somebody else.

A．while B．unless C．because D．once

全面解析：一个人可以失败很多次，但是只要他没有开始责怪旁人，他还不算是一个失败者。上下文存在逻辑上的条件关系，结合句意，选B。

25．Hardly the bus suddenly pulled away.

A．they had got to the bus stop than B．they got to the bus stop than

C．did they get to the bus stop when D．had they got to the bus stop when

全面解析：他们刚到公共汽车站，汽车就突然开走了。hardly +主语+had done +when+主语+did “ 一......就......”, 为固定句型，当hardly位于句首时，hardly...when之间的句子需要部分倒装。故选D。

26．She hasn't got any hobbies____ you call watching TV a hobby.

A．when B．unless C．until D．once

全面解析：她没有任何的兴趣爱好，除非你觉得看电视也能算是一种爱好。A： when“当…...时;既然”；B： unless“除非，如果......不.....”；C： until“直到”；D： once “一旦”。此处是unless引导的条件状语从句，故选B。

27．All of our equipment dates back to the 1960s and 1970s; we cannot make products that compete with foreign products, we can buy the necessary technology.

A．unless B．while C．once D．if

全面解析：我们所有的设备都可以追溯到20世纪60年代和70年代；除非我们能买到必要的技术，否则我们不能生产与外国产品相竞争的产品。A. unless“除非”； B. while “当......时候”；C. once“一旦”；D. if“如果”。分析句子可知，本句为条件状语从句，所以应用表示条件的从属连词，故unless符合句意。选A。

28．—I feel like ________ for a walk. Will you go with me?

—If Mary goes, ________.

A．to go; so will I B．to go; so do I

C．going; so will I D．going; so do I

全面解析：—我想出去散散步。你们愿意一起吗？—如果Mary去的话，我也去。本题第一空考查feel like doing sth的结构；第二空if 从句中用一般现在时，主句用将来时，表“我也会去的”，两个主语适用于相同的情况，用so引导的部分倒装so will I。故答案选C。

29．If you can do these things by the time you ________ college, you'll do well in the test of college life.

A．will go to B．went to C．go to D．have gone to

全面解析：如果你能到上大学的时候做这些事，你将在大学生活中取得好成绩。在条件状语从句和时间状语从句中，用一般现在时表示将来，故选C。

30．If our marketing plan succeeds, we _______ the sales by thirty percent next year.

A．would increase B．will increase

C．would have increased D．will be increasing

全面解析：如果我们的营销计划成功，我们明年销售将增加百分之三十。If条件句使用的是一般现在时代替一般将来时，所以主句也是一般将来时，和next year搭配使用。所以选B。

31．You will be able to produce high quality reports ______ you are committed and never give up.

A．as though B．even if C．as long as D．in case

全面解析：只要你投入，并从不放弃，你就能写出高质量的报告。A. as though“好像”； B. even if“ 即使”；C. as long as “只要”； D. in case“万一”。as long as引导的条件状语从句，答案为C。

32．The law of market shows _______ a product becomes rare to reach, its price will certainly rocket.

A．unless B．once C．though D．since

全面解析：市场规律表明，一旦某产品稀缺，其价格就会上涨。上下文存在逻辑上的条件关系，所以用once。故选B。

33．You're going to miss the bus _____ you hurry.

A．if B．as C．though D．unless

全面解析：考查状语从句。A. if 如果；B. as 由于；C. though尽管；D.unless除非。句意：你将错过公共汽车，除非你快点。故选D.

34．________a teacher has given permission is a student allowed to enter the classroom.

A．If only B．Only if C．As if D．Even if

全面解析：考查状语从句。if only意为“只要，若要……就好了”；as if意为“好像”；even if意为“即使”；only if意为“只有”，通常位于句首。从句意和句子的结构可知本题正确答案为B。

35．Magic shows are interesting ______ the audience does not discover how the tricks are done.

A．as long as B．so that C．as if D．ever since

全面解析：只要观众不知道魔术是怎么变的，魔术表演就很有趣。A.as long as“只要”；B.so that“以便于，为的是”；C.as if“似乎，好像”；D. ever since“自从……以来”。后半句是前半句的条件，故选A。

36．Some developing countries will feel the economic squeeze and fail to focus on long-term development to end poverty, _______ heavy debts remain.

A．unless B．though C．even if D．provided that

全面解析：如果仍有沉重的债务，一些发展中国家就会感到经济紧缩和不能集中精力长期发展以消除贫穷。provided that“如果”，引导条件状语从句，故选D。

37．I was about ______ the classroom ______ the head teacher stopped me.

A．leaving；when B．leave；while

C．to leave；when D．to leaving；while

全面解析：我正要离开教室，这时班主任拦住了我。表示“某人正要做某事，这时……”句型为sb. be about to do sth. when…，故选C。
38．The government calls on us to avoid visiting crowded areas and medical institutions ______it is necessary.

A．while B．because C．unless D．when

全面解析：政府号召我们，若非确实必要的话，不要去人群密集场所和医疗机构。此处是unless 引导的条件状语从句，故选C。

39．We can choose to be happy if we want, ______ we can look at everything in a positive way.

A．for fear that B．as long as C．in case D．even if

全面解析：只要我们用乐观的态度看待一切，如果我们想，我们就可以选择让自己快乐。A. for fear that“生怕，唯恐”；B. as long as“只要”；C. in case“以防”；D. even if“即使”。故选B。

40．________ I live，I will never give in to the enemy.

A．As far as B．As long as C．As well as D．As soon as

全面解析：只要我活着，我决不向敌人屈服。as far as“只要，远到…...”；as long as“只要，既然”；as well as“也，除......之外，此外”；as soon as“一.....就......”。故选B。

41．The beast said that the made a promise ________ anyone released him from the cage, he would make his wish come true.

A．that B．when C．that if D．if

全面解析：野兽说他许下了一个诺言，如果有人把他从笼子里放出来，他就会实现他的愿望。分析句子可知，promise后接同位语从句，同位语从句，句意和句子结构完整，所以连接词为that。同位语从句为if引导的条件状语从句。故选C。

42．It is difficult for us to imagine the beauty of Jiuzhaigou, ______ we have been there in person.

A．when B．if C．unless D．in case

全面解析：我们无法想象九寨沟的美，除非我们曾经亲自去过。A. when“当…...时候”；B. if“如果”；C. unless“除非”；D. in case“万一”。分析句意可知，设空处应是一个条件状语从句，故选C。

43．—As is reported, retirement age should be put off immediately.

— Easier said than done.We take ___________all factors into consideration, we shall be faced with some other social problems.

A．unless B．until C．if D．once

全面解析：—据报道，退休年龄应该立刻被推迟。—说起来容易做起来难。如果我们不将所有的因素考虑在内，我们会面临很多其他的社会问题的。根据语境用unless引导条件状语从句，表示“除非，如果不”。until“直到”；if“如果”；once“一旦”。故答案选A。

44．—Dad, I'd like to take a gap year to China.

—Good idea, ___you can afford the time.

A．provided that B．in case C．even if D．so that

全面解析：句意：—爸爸，我想去中国度过一个空档年。—好主意，假如你有时间。A. provided that”假如“；B. in case”万一“；C. even if”尽管“；D. so that”因此“。根据句意可知，此处使用provided that引导条件状语从句。故选A。

45．There is no goal that you cannot obtain ___ you have an honest attitude and a strong will.

A．even if B．so that C．except that D．as long as

全面解析：只要你有诚实的态度和强大的意志，就没有你无法达到的目标。A. even if”即使“；B. so that”因此，为了“；C. except that ” 除了......之外“；D. as long as”只要“。根据句意可知选D。

46．We'll have a picnic near the river tomorrow it rains heavily.

A．until B．unless C．if D．when

全面解析：我们将在小河附近进行一次野餐，除非明天下大雨。A.until"直到"；B.unless"如果不，除非"；C.if"假如，是否"；D.when"当……时候"。此处为条件状语从句，表示“如果不”应用unless。故选B。

47．There can be no equality of opportunity ______ everyone follows the rules at their own game.

A．if B．unless C．once D．since

全面解析：除非每个人都遵守自己的游戏规则，否则就不可能有机会平等。A. if “如果”；B. unless“除非”；C.once “一旦”；D.since“自从”。根据“no equality of opportunity”可知，没有平等机会，除非大家遵守规则。故选B。

48．_________ my heart still beats, I will go on working for the people.

A．As soon as B．As far as C．As long as D．As much as

全面解析：只要我的心脏还在跳动，我就要为人民工作。A. As soon as“一……就……”；B. As far as“就……而言”；C. As long as“只要”；D. As much as“多达，与……一样多”。此处是as long as引导条件状语从句。故选C。

49．You will never achieve success _______ you keep working hard.

A．when B．if C．unless D．because

全面解析：除非你继续努力，否则你永远不会成功。A. when“当……时候”；B. if“如果”；C. unless“除非”；D. because“因为”。unless是从属连词，引导条件状语从句，含有否定意义，相当于if条件状语从句的否定形式，所以unless= if not。根据句意，unless符合题意，故选C。