高考英语语法词汇专项突破：04-1非谓语动词经典考题200例精练精析(4-2)+答题卡(原卷版)
第一组：非谓语动词专项训练经典考题200例精练精析之50题
姓名：__________ 班级: _________ 限时：40分钟 得分：____________
在横线上依据所给单词用其正确形式填空。
1.(改编自2010﹒浙江) The traffic rule says young children under the age of four and _______ (weigh) less than 40 pounds must be in a child safety seat.
2.(改编自2011﹒全国卷) The next thing he saw was smoke ______ (rise) from behind the house.
3.(改编自2011﹒全国卷II) The island, _______ (join) to the mainland by a bridge, is easy to go to.
4.(改编自2011﹒全国卷II) Sarah pretended to be cheerful, ______ (say) nothing about the argument.
5.(改编自2011﹒北京) It’s important for the figures______ (update) regularly.
6.(改编自2011﹒北京) Sit down, Emma. You will only make yourself more tired, _____ (keep) on your feet.
7.(改编自2011﹒天津) _______ into English, the sentence was found to have an entirely different word order.
8.(改编自2011﹒上海春招) Mike found his missing car in the street outside his house, ______ (look) newly cleaned and polished.
9.(改编自2011﹒上海春招) ________ in 1955, Disneyland in California is regarded by many as the original fun park.
10.(改编自2011﹒上海春招) Harrison Ford is thought to be one of the few movie stars ______（work) as a carpenter before.
11.(改编自2011﹒山东) Look over there—there’s a very long, winding path _______ (lead) up to the house.
12.(改编自2011﹒江苏) Recently a survey _____ (compare) prices of the same goods in two different supermarkets has caused heated debate among citizens.
13.(改编自2011﹒福建) Tsinghua University, _______ (found) in 1911, is home to a great number of outstanding figures.
14.(改编自2011﹒福建) The difference in thickness and weight from the earlier version makes the iPad 2 more comfortable _______ (hold) .
15.(改编自2011﹒安徽) Tom asked the candy makers if they could make the chocolate easier ______ (break) into small pieces.
16.(改编自2011﹒浙江) Bats are surprisingly long-lived creatures, some ______ (have) a life span of around 20 years.
17.(改编自2011﹒浙江) Even the best writers sometimes find themselves ______ (lose) for words.
18.(改编自2011﹒浙江) If they win the final tonight, the team are going to tour around the city ______ (cheer) by their enthusiastic supporters.
19.(改编自2011﹒四川) Ladex doesn’t feel like_______ (study）abroad. Her parents are old.
20.(改编自2011﹒四川) Simon made a big bamboo box______ (keep) the little sick bird till it could fly.
21.(改编自2011﹒四川) _______ (offer) an important role in a new movie, Andy has a chance to become famous.
22.(改编自2011﹒重庆) More TV programs, according to government officials, will be produced __________ (raise) people’s concern over food safety.
23.(改编自2011﹒重庆)Michael put up a picture of Yao Ming beside the bed to keep himself ________ (remind) of his own dreams.
24.(2011﹒陕西﹒T14) Claire had her luggage _______ (check) an hour before her plane left.
25.(改编自2011﹒陕西) More highways have been built in China, ________ (make) it much easier for people to travel form one place to another.
26.(改编自2011﹒湖南) The ability _______ (express) an idea is as important as the idea itself.
27.(改编自2011﹒湖南) The players ______ (select) from the whole country are expected to bring us honor in this summer game .
28.(改编自2011﹒湖南) Do you wake up every morning _______ (feel) energetic and ready to start a new day
29.(改编自2011﹒辽宁) _______ (gather) around the fire, the tourists danced with the local people.
30.(改编自2011﹒江西) On receiving a phone call from his wife _______(say) she had a fall, Mr. Gorden immediately rushed home from his office.
31.(改编自2011﹒辽宁)Twenty students want to attend the class that aims to teach how ______ (read) fast.
32.(改编自2011﹒江西) Having finished her project, she was invited by the school ________ (speak) to the new students.
33.(改编自2012﹒江西) John has really got the job because he showed me the official letter _______ (offer) him it.
34.(改编自2012﹒湖南)We've had a good start, but next, more work needs ________ (do) to achieve the final success.
35.(改编自2012﹒重庆) Before you quit your job, ______ (consider) how your family would feel about your decision.
36.(改编自2012﹒重庆)We’re having a meeting in half an hour. The decision ______ at the meeting will in the future of our company.
37.(改编自2012﹒重庆)______ (ask) to work overtime that evening, I missed a wonderful film.
38.(改编自2012﹒辽宁)This machine is very easy_______ (operate). Anybody can learn to use it in a few minutes.
39.(改编自2012﹒四川) I looked up and noticed a snake ______ (wind) its way up the tree to catch its breakfast.
40.(改编自2012﹒四川) Before driving into the city, you are required to get your car _________(wash).
41.(改编自2012﹒陕西)________ (stand) in a long queue, we waited for the store to open to buy a New iPad .
42.(改编自2012﹒陕西) If he takes on this work, he will have no choice but ______ an even greater challenge.
43.（改编自2012北京卷第23题）One learns a language by making mistakes and ______ (correct) them.
44.(改编自2012﹒北京)_______ (use) with care, one tin will last for six weeks.
45.(改编自2012﹒全国卷II)The old man sat in front of the television every evening, happy ____(watch) anything that happened to be on.
46.(改编自2012﹒全国卷II)Tony lent me the money, ______(hope) that I’d do as much for him.
47.(改编自2012﹒北京)Birds’ singing is sometimes a warning to other birds ________ (stay) away.
48.(改编自2012﹒全国新课程卷) Film has a much shorter history, especially when ______ (compare) to such art forms as music and painting.
49.(改编自2012﹒全国新课程卷) The party will be held in the garden, weather _______ (permit).
50.(改编自2012﹒山东) After completing and signing it, please return the form to us in the envelope _________ (provide).
高考英语语法词汇专项突破：非谓语动词经典考题200例精练精析(4-2)答题卡
姓名：__________ 班级: _________ 限时：40分钟 得分：____________
第二组：非谓语动词经典考题200例精练精析(4-2)（满分100分，每题2分，限时40）
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17 34高考英语语法词汇专项突破：04-2非谓语动词经典考题200例精练精析(4-2)(答案解析版)
第二组：非谓语动词专项训练经典考题200例精练精析之50题
姓名：__________ 班级: _________ 限时：40分钟 得分：____________
在横线上依据所给单词用其正确形式填空。
1.(改编自2010﹒浙江) The traffic rule says young children under the age of four and _______ (weigh) less than 40 pounds must be in a child safety seat.
答案与解析：weighing。根据句子结构：the traffic rule是主语；says谓语动词；young children under the age of four and ____ less than 40 pounds must be in a child safety seat是宾语从句。宾语从句中的主干为：young children must be in a child safety seat。under the age of four and ____ less than 40 pounds作定语用于修饰宾语从句主语children。动词weigh与名词children是主动关系。故填weighing。句意：交通法则规定四岁以下并且体重不超过四十磅的婴儿必须坐在婴儿安全座上。
2.(改编自2011﹒全国卷) The next thing he saw was smoke ______ (rise) from behind the house.
答案与解析：rising。rise“升起来”和see“看到”这两个动作是同时发生的，因此用现在分词形式表示非谓语动词动作和谓语动词动作同时发生。故填rising。句意：接下来我们看到的是烟雾从房子的后面冒出来。
3.(改编自2011﹒全国卷II) The island, _______ (join) to the mainland by a bridge, is easy to go to.
答案与解析：joined。join是及物动词，但空格后没有宾语，故使用join的过去分词形式，充当表示状态或性质的形容词用，这里包含短语be joined to，意思是“与……相连：与另一物体或部分相连或连接在一起。”。故填joined。句意：因为有一座桥与大陆连接，到那个岛上去很容易。
4.(改编自2011﹒全国卷II) Sarah pretended to be cheerful, ______ (say) nothing about the argument.
答案与解析：saying。句中没有连词，因此要用所给动词的非谓语动词形式，根据及物动词say与句子主语Sarah的主谓关系看出用其现在分词的主动形式作伴随状语。故填saying。句意是：萨拉装出高兴的样子，对争吵只字不提。
5.(改编自2011﹒北京) It’s important for the figures______ (update) regularly.
答案与解析：to be updated。for引出的逻辑主语the figures与update存在着被动关系，句尾的regularly表示经常发生的事，故用一般现在时。分析句子的结构看出是：It’s +adj.+for... to do...，故填不定式的被动语态to be updated。句意是：经常更新这些数值很重要。
6.(改编自2011﹒北京) Sit down, Emma. You will only make yourself more tired, _____ (keep) on your feet.
答案与解析：keeping。make yourself more tired与keeping on you feet同时进行，故填keeping，现在分词作条件状语，相当于if you keep on you feet,。句意：Emma，你坐下吧，老这么站着你会累的。
7.(改编自2011﹒天津) _______ into English, the sentence was found to have an entirely different word order.
答案与解析：Translated。the sentence与translate之间存在着被动关系，故用过去分词作时间状语。句意：翻译成英语后，发现这个句子的词序全变了。
8.(改编自2011﹒上海春招) Mike found his missing car in the street outside his house, ______ (look) newly cleaned and polished.
答案与解析：looking。分析句子，根据句中没有连词确定不可以用谓语形式；句子主语his missing car与look是主谓关系，是一个主系表结构，不可以用被动，因此用现在分词作伴随状语。故填looking。句意：Mike在他屋子外的大街上发现了他丢失的汽车，看上去刚擦得干干净净，还打过腊。
9.(改编自2011﹒上海春招) ________ in 1955, Disneyland in California is regarded by many as the original fun park.
答案与解析：opened。及物动词open的意思是“开业”，与Disneyland之间存在着被动关系，根据时间状语in 1955看出开业的事实已经发生，所以用过去分词作状语。故填Opened。句意是：很多人认为1955年开业的加利福尼亚迪斯尼乐园非常有趣。
10.(改编自2011﹒上海春招) Harrison Ford is thought to be one of the few movie stars ______（work) as a carpenter before.
答案与解析：to have worked。Harrison Ford“做过木匠”这事发生句子谓语动词之前，不定式应当用完成式，表示发生过，所以不可以是现在分词working，因为现在已经是movie star；work是不及物动词，虽然过去分词可以表示完成，但是有被动意义；当考虑到现在分词完成时的时候，要注意虽然意思没有问题，但是现在现在分词完成时通常不可以作定语。因此用不定式完成时to have worked。句意为：Harrison Ford被认为是为数不多的曾经做过木匠的电影明星之一。
11.(改编自2011﹒山东) Look over there—there’s a very long, winding path _______ (lead) up to the house.
答案与解析：leading。leading作为path的后置定语，相当于which leads。句意：看那儿，有一条长长的蜿蜒小路向上延伸到那座房子。
12.(改编自2011﹒江苏) Recently a survey _____ (compare) prices of the same goods in two different supermarkets has caused heated debate among citizens.
答案与解析：comparing。句子的主语是a survey，谓语动词是has caused，宾语是heated debate。由此可见，原句不缺主干成分，“ _____ (compare) prices of the same goods in two different supermarkets”该部分是来修饰survey的，作后置定语。由于prices作compare的宾语，是主动形式，所以填comparing。句意：最近一项调查引起了市民们的激烈讨论，该调查是比较在两个不同超市里的相同商品的价格。
13.(改编自2011﹒福建) Tsinghua University, _______ (found) in 1911, is home to a great number of outstanding figures.
答案与解析：founded。Tsinghua University与found之间存在着被动关系，用过去分词founded表被动，也表动作已完成，作非限制性定语，相当于which was founded...。故填founded。句意：建于1911年的清华大学培养了一大批杰出的人士。
14.(改编自2011﹒福建) The difference in thickness and weight from the earlier version makes the iPad 2 more comfortable _______ (hold) .
答案与解析：to hold。在用easy, difficult, hard, comfortable等形容词构成的复合宾语时，用不定式作状语。虽然hold与前面的the iPad 2有逻辑上的动宾关系，但是由于此类形容词的通常用不定式的主动形式表示被动意义。故填to hold。句意：iPad 2与早期的型号在厚度和重量上不同，拿在手里很舒服。
15.(改编自2011﹒安徽) Tom asked the candy makers if they could make the chocolate easier ______ (break) into small pieces.
答案与解析：to break。在用easy, difficult, hard, comfortable等形容词构成的复合宾语时，用不定式作状语，通常用不定式的主动形式表示被动意义。虽然to break与the chocolate存在着动宾关系，但是用主动式的不定式。故填to break。句意：Tom问糖果制造商能否把巧克力做得更容易扳成小块。
16.(改编自2011﹒浙江) Bats are surprisingly long-lived creatures, some ______ (have) a life span of around 20 years.
答案与解析：having。had和have是谓语动词形式，题中没有连词，无法并存两个句子，不可以填。表将来的不定式to have也不可以；having表伴随，本题是一个独立主格结构：代词+现在分词。故填having。句意：令人惊讶的是，蝙蝠是长寿的动物，有些能活20年左右。
17.(改编自2011﹒浙江) Even the best writers sometimes find themselves ______ (lose) for words.
答案与解析：lost。lose没有宾语，故用过去分词lost当形容词用，作find themselves的宾语补足语。故填lost。句意：甚至最优秀的作家有时也会发现他们难以用文字表达自己。
18.(改编自2011﹒浙江) If they win the final tonight, the team are going to tour around the city ______ (cheer) by their enthusiastic supporters.
答案与解析：to be cheered。分析句子的结构看出是填非谓语动词，像be cheered，were cheered等谓语动词形式不考虑。根据就句中are going to可以考虑将来，因此用表示被动的to be cheered表示符合题意。句意：如果他们赢了今晚的决赛，队员们将会巡游全城，接受热心支持者的欢呼。
19.(改编自2011﹒四川) Ladex doesn’t feel like_______ (study）abroad. Her parents are old.
答案与解析：studying。feel like doing sth.想要做某事，习惯表达法。句意：Ladex不愿意去国外留学，因为她的父母年纪大了。
20.(改编自2011﹒四川) Simon made a big bamboo box______ (keep) the little sick bird till it could fly.
答案与解析：to keep。make a big bamboo box的目的是为了keep the little sick bird，因此用不定式表示目的状语。故填to keep。有同学认为make是使役动词，认为是make sb. do sth.结构而误填keep。句意：Simon制作了一个大竹盒来养这只生病的小鸟，直到它能飞起来。
21.(改编自2011﹒四川) _______ (offer) an important role in a new movie, Andy has a chance to become famous.
答案与解析：Offered。offer sb. sth.(主动)提供某人某物。句中Andy与offer之间存在着被动关系，所以用过去分词作原因状语。句意：Andy在一部新影片中扮演重要角色，这就有了成名的机会。
22.(改编自2011﹒重庆) More TV programs, according to government officials, will be produced __________ (raise) people’s concern over food safety.
答案与解析：to raise。to raise表示目的状语，事情还没有发生，是前面“将制作更多的电视节目”的目的。句意：据政府官员说，为了唤起人们对食品安全的关注，将制作更多的电视节目。
23.(改编自2011﹒重庆)Michael put up a picture of Yao Ming beside the bed to keep himself ________ (remind) of his own dreams.
答案与解析：reminded。结构是：keep+宾语+宾语补足语，空格前的宾语himself与动词remind之间存在着动宾关系，所以用过去分词作宾语补足语。句意：Michael在他的床头贴了姚明的照片提醒自己不要忘了自己的梦想。
24.(2011﹒陕西﹒T14) Claire had her luggage _______ (check) an hour before her plane left.
答案与解析：checked。have sth. done“让…被做”。逻辑主语是her luggage，和check的关系是被动关系，所以填过去分词checked作宾语补足语。句意为：Claire在登机前一小时她携带的行李接受了检查。
25.(改编自2011﹒陕西) More highways have been built in China, ________ (make) it much easier for people to travel form one place to another.
答案与解析：making。句意：空格后面是it，说明是主动关系，根据句子的结构看出要填的是非谓语动词表示结果，所以用现在分词作结果状语，相当于which makes it ...。句意是：中国修建了越来越多的高速公路，人们更加方便从一个地方到另外一个地方。
26.(改编自2011﹒湖南) The ability _______ (express) an idea is as important as the idea itself.
答案与解析：to express。ability作为一个抽象名词，通常使用动词不定式作定语，类似要求用非谓语动词不定式作定语的还有chance, opportunity, way, right等。express 的非谓语动词作定语修饰的是ability, 为主动关系，本题的ability对应的形容词able也是跟不定式，即短语be able to do sth。故填to express。句意：想法重要，提出想法的能力也同样重要。
27.(改编自2011﹒湖南) The players ______ (select) from the whole country are expected to bring us honor in this summer game .
答案与解析：selected。根据句子的谓语动词are expected看出此处是非谓语动词，不可能是谓语动词。结合与The players的关系可以确定用表示被动意义的过去分词作定语。句意：人们期待着从全国各地挑选出来的运动员能在今年夏季的赛事中给我们带来荣誉。
28.(改编自2011﹒湖南) Do you wake up every morning _______ (feel) energetic and ready to start a new day
答案与解析：feeling。句意为“每天早上醒来后，你是否感到精力充沛，并为新的一天作好了准备？”wake up作句子的谓语，句中没有连词，不可以是谓语动词。根据句意看出feel表示与 wake up 同时发生的动作，且与逻辑主语 you 构成主动关系，故应该用动词的现在分词feeling来作伴随状语。句意是：你每天早晨醒来时都感觉精力充沛并准备好开始新的一天吗？
29.(改编自2011﹒辽宁) _______ (gather) around the fire, the tourists danced with the local people.
答案与解析：Gathering。gather的动作由the tourists执行, 用主动形式, 并与dance同时进行, 故用现在分词feeling作伴随状语，表示伴随情况。句意：游客们围绕在火堆旁边，与当地人一起跳舞。
30.(改编自2011﹒江西) On receiving a phone call from his wife _______(say) she had a fall, Mr. Gorden immediately rushed home from his office.
答案与解析：saying。分析句子看出前面要填非谓语动词，因为没有连词连接，所以不可能是句子，不能填谓语动词。非谓语动词修饰phone call，前后动词的动作在同一时间发生，表主动进行用现在分词的形式。故填现在分词saying。句意是：在接到妻子的电话说她摔倒后，Gorden先生立刻从办公室冲回家。
31.(改编自2011﹒辽宁)Twenty students want to attend the class that aims to teach how ______ (read) fast.
答案与解析：to read 。及物动词teach后跟的how看出是跟宾语，how的提示是一个相当于名词可以作宾语的结构作teach的宾语，因此用“特殊疑问词+不定式”结构，相当于一个名词从句，即how + to read fast= how they can read fast。句意：有二十名学生想听旨在提高阅读速度的课程。
32.(改编自2011﹒江西) Having finished her project, she was invited by the school ________ (speak) to the new students.
答案与解析：to speak。考查不定式作补足语。根据invite看出是invite sb. to do sth.，本句是被动语态，即be invited to do...，因此不定式作主语补足语。故填to speak。句意是：在完成她的项目后，她被学校邀请去给新生讲话。
33.(改编自2012﹒江西) John has really got the job because he showed me the official letter _______ (offer) him it.
答案与解析：offering。考查非谓语动词作定语。offer的逻辑主语为空格前名词letter，根据句意，the official letter与offer为逻辑上的主动关系，故填现在分词主动形式offering作定语。句意：John的确得到了这份工作, 因为他给我看了提供他工作的官方信函。
34.(改编自2012﹒湖南)We've had a good start, but next, more work needs ________ (do) to achieve the final success.
答案与解析：doing /to be done。因为work与do为被动关系，而need后表被动用-ing的主动形式表被动含义，或用不定式的被动形式，故填doing /to be done。句意是：我们有了一个良好的开端，但接下来，要取得最后的成功，还需要做更多的工作。
35.(改编自2012﹒重庆) Before you quit your job, ______ (consider) how your family would feel about your decision.
答案与解析：consider。考查谓语动词与非谓语动词的区别。结合选项来分析句子结构，逗号前为时间状语从句，后面实际上是一个祈使句。由此可知应该填动词原形consider。句意是：在你辞职之前，考虑一下你的家人会如何看待你的决定。
36.(改编自2012﹒重庆)We’re having a meeting in half an hour. The decision ______ at the meeting will in the future of our company.
答案与解析：to be made。考查不定式作定语。分析句子结构可知，空白处为后置定语，与被修饰的名词是逻辑上的被动关系，而且是将要发生的动作。由此可知填to be made表示被动和将来。句意是：我们半小时后要开会。会上将要作出的决定将关系到我们公司的未来。
37.(改编自2012﹒重庆)______ (ask) to work overtime that evening, I missed a wonderful film.
答案与解析：Having been asked。考查分词短语作状语。逗号前为原因状语，根据句子的结构应该是非谓语动词作状语，空白处与句子的主语为逻辑上的动宾关系，非谓语动词与句子的谓语动词missed有明显的时间先后关系，所以用现在分词完成式的被动形式，可作时间状语、原因状语、结果状语、伴随状语等。故填Having been asked。句意是：由于那天晚上被要求加班，我错过了一场精彩的电影。
38.(改编自2012﹒辽宁)This machine is very easy_______ (operate). Anybody can learn to use it in a few minutes.
答案与解析：to operate。考查不定式作状语。在句型“主语+be+adj+to do”中，如果这个主语是动词do的逻辑宾语，故用主动表被动，其中的形容词多是easy, difficult, hard, fit, comfortable等词。故填to operate。句意是：这台机器很容易操作。任何人都可以在几分钟内学会使用它。
39.(改编自2012﹒四川) I looked up and noticed a snake ______ (wind) its way up the tree to catch its breakfast.
答案与解析：winding。此题考查现在分词作宾语补足语。winding its way与宾语snake之间为主动关系且此动作正在进行，notice sb. doing sth.“注意到某人正在做某事”。故填现在分词winding作宾语补足语。句意是：我抬头一看，发现一条蛇蜿蜒爬上树去抓它的早餐。
40.(改编自2012﹒四川) Before driving into the city, you are required to get your car _________(wash).
答案与解析：washed。考查过去分词作宾语补足语。此题中使役动词get后接的宾语car与作宾语补足语的动词wash之间为被动关系，构成短语：get sth. done。故填washed。句意为：在驱车进城之前，你必须将你的车洗了。
41.(改编自2012﹒陕西)________ (stand) in a long queue, we waited for the store to open to buy a New iPad .
答案与解析：Standing。根据句子的逗号和没有连词连接句子可以确定前面是一个短语作状语，根据_______ (stand)说明非谓语动词作题干的状语，逻辑主语是句子的主语we，非谓语动词与逻辑主语是主动关系，且其动作与谓语动词wait的动作同时进行，用动词v-ing的一般式，因此填Standing。句意是：我们排着长队等着商店开门买新iPad。
42.(改编自2012﹒陕西) If he takes on this work, he will have no choice but ______ an even greater challenge.
答案与解析：to meet。考查非谓语动词作介词宾语。所填词与前文构成固定句型have no choice but to do sth，介词but比较特殊可以跟不定式作宾语，通常介词宾语用动名词而不是不定式，这是一个比较特殊的句型，而且如果前面有实义动词do的形式还可以把to省掉，如：He did nothing but cry.。句意是：如果他接受这项工作，他将别无选择，只能迎接更大的挑战。
43.（改编自2012北京卷第23题）One learns a language by making mistakes and ______ (correct) them.
答案与解析：correcting。by用作介词，表示“用……方式；凭(靠/借)……手段”，后接动词时，用其V-ing形式作宾语。由句意及并列连词and可知，空缺应与making mistakes并列作介词by的宾语，要用V-ing形式。故填correcting。句意是：一个人是通过犯错和纠正它们学习语言的。
44.(改编自2012﹒北京)_______ (use) with care, one tin will last for six weeks.
答案与解析：Used。句子的主语one tin和use之间是被动关系，故用过去分词形式作状语，相当于条件状语从句If it is used with care。故用过去分词作状语，填Used。句意是：锡罐用得小心的话，可以用六周。
45.(改编自2012﹒全国卷II)The old man sat in front of the television every evening, happy ____(watch) anything that happened to be on.
答案与解析：to watch。此处happy to watch anything that happened to be on作sat的伴随状语，形容词happy, sorry, pleased等跟不定式作状语。故填to watch。句意：那位老人每天晚上坐在电视机前，高兴地看要上演的任何节目。
46.(改编自2012﹒全国卷II)Tony lent me the money, ______(hope) that I’d do as much for him.
答案与解析：hoping。此处现在分词短语hoping that I’d do as much for him作伴随状语，不定式作目的状语在句尾不需要逗号隔开，在句首通常用逗号隔开。句意：Tony借给我了钱，希望我加倍还他。
47.(改编自2012﹒北京)Birds’ singing is sometimes a warning to other birds ________ (stay) away.
答案与解析：to stay。考查非谓语动词。空格前名词birds是stay动作的执行者，stay用主动形式。如果其它鸟已经stay away躲开了，警告就没有意义了，所以未发生，因此用to do表示目的，目的状语用不定式。故填to stay。句意是：鸟儿的歌声有时是对其他鸟类的一种警告，让它们远离。
48.(改编自2012﹒全国新课程卷) Film has a much shorter history, especially when ______ (compare) to such art forms as music and painting.
答案与解析：compared。考查非谓语动词过去分词。此处是被省略的时间状语从句，其相当于：when film is compared to such art forms as music and painting. 这里film和compare之间是被动关系，故用过去分词。又因为主语一致，所以film被省略。故填compared。句意：电影的历史短的多，尤其是当它和像音乐和绘画这样的艺术形式相比时。
49.(改编自2012﹒全国新课程卷) The party will be held in the garden, weather _______ (permit).
答案与解析：permitting。考查独立主格与非谓语动词。此处主句的主语party 和weather不一致，所以weather保留作permitting的逻辑主语，构成独立主格结构。另外，weather与permit之间是主动关系，故用现在分词。句意是：如果天气允许，聚会将在花园里举行。
50.(改编自2012﹒山东) After completing and signing it, please return the form to us in the envelope _________ (provide).
答案与解析：provided。考查非谓语动词之过去分词作定语。此处动词provide与其逻辑主语envelope之间是被动关系，在句中作定语，相当于which is provided。句意为：完成并签名后，请把表格放入我们提供的信封内送回。
