语法专题6 情态动词
Ⅰ.单句语法填空
1．(2015·重庆，12改编)You ______ be Carol.You haven't changed a bit after all these years.
答案：must 空后为动词原形，故此处只能填助动词或情态动词；根据下文内容可知此处是说话人的猜测，因为有“据”可循，所以非常肯定，故填语气最为强烈的情态动词must，意为“一定”。句意为：你一定是卡罗尔。这么多年后你一点儿都没变。根据语境可知，此处应该用情态动词表示推测，由下文“这么多年后你一点儿也没变”可推知此处为非常肯定的猜测，故填must，意为“一定”。
2．(2017·湖南，25改编)—I've prepared all kinds of food for the picnic.
—Do you mean we______ bring anything with us?
答案：needn't 句意为：——我已经为野餐准备了各种食物。——你的意思是我们不必带任何东西了吗？根据句意可知填needn't，意为“不必要”。
3．(2015·四川，2改编)You________be careful with the camera.It costs！
答案：must 根据空后的动词原形be可知此处填情态动词，根据句意和后面的感叹号可知这是说话人提出的要求，且语气非常强烈，因此只能填must。句意为：你必须要小心使用相机。它很贵重！根据下文的It costs！可知，此处是说话人对使用相机的人提出的要求，must意为“必须”，表示说话人主观上的要求，语气强烈。
4．(2015·北京东城模拟改编)—The fire in the supermarket last night was terrible！
—They ________ have taken some measures to prevent it occurring.
答案：should 考查“情态动词＋have done”结构。句意为：——超市昨晚的火灾很可怕。——他们本应该采取一些措施来预防火灾的发生。这里表示“应该做某事而实际上未做”，所以用should have done结构，故答案为should。
5．(2015·北京，29改编)—Can't you stay a little longer？
—It's getting late.I really________go now. My daughter is home alone.
答案：must 句意为：——你不能再呆一会儿吗？——天色晚了。我真的必须得走了。我女儿一个人在家。根据语境中“天晚了”和“女儿一个人在家”可知，这里表示必须得走了。must意为“必须”。
6．(2015·安徽黄山第二次质检改编)—I'm afraid I have to leave now, for you see, he is waiting for me.
—Well, if you ________， at least wait till the heavy rain stops.
答案：must 句意为：——恐怕现在我不得不离开了，因为你知道，他在等我。——好的，如果你非得走，至少要等到大雨停了再走。根据语境可知填must，意为“偏要；非得”。
7．(2017·陕西，25改编)My book，The House of Hades, is missing.Who ______ have taken it？
答案：could 句意为：我那本《决战冥王圣殿》不见了。谁会把它拿走了呢？由句意可知，设空处表示说话者对过去发生事情的一种疑问的推测，故填could。
8．(2015·天津，7改编)I ________have worried before I came to the new school，for my classmates here are very friendly to me.
答案：needn't needn't have done为情态动词中表虚拟的用法，意思为“本不必做某事却做了”。
9．(2015·陕西，21改编)You ________feel all the training a waste of time，but I'm a hundred percent sure later you'll be grateful you did it.
答案：may 情态动词may表推测时，意为“或许，可能”。句意：你或许觉得所有的训练都是浪费时间，但是我敢百分百保证，你以后一定会感恩你这么做了。
10．(2015·福建，27改编)—Sorry，Mum！I failed the job interview again.
—Oh，it's too bad.You ________ have made full preparations.
答案：should should have done本应该干某事而事实上没干。由failed可知“我”没做好充分的准备，因此用should have done。
.情态动词填空
在空白处填入最合适的情态动词。
Despite the fact that you __1__ wear school uniform every day, you __2__ still find yourself a place at the cutting edge(领先地位) of fashion. From coloured shoelaces to special snacks(零食), this is what the cool kids in your class believe in for the summer.
It __3__ not be practical for you to have a new pair of shoes every day, but moving from one colour shoelaces to another __4__ show your desire for a new look. Bright colours—red, green, light gold, pink, purple, are the top choices. There are also sports laces that come in colour combinations, such as red/white and red/black. You __5__ even try to lace up your sports shoes in two colours!
Has changing cell phone accessories(小挂件) become part of your life? Although you __6__ not be able to afford the most ad vanced phone, you __7__ still decorate it. Girls __8__ prefer fluffy(毛茸茸的)Teddy Bears that change colour according to the temperature, while many boys like taking accessories that say things such as “The teacher is coming.”
Try sticking photos(大头照). They are cheap, convenient and __9__ be carried around in your wallet. You __10__ even choose special backgrounds of cartoon figures to show your individuality(个性)．
1．______ 2.______ 3.______ 4.______ 5.______
6．______ 7.______ 8.______ 9.______ 10.______
答案：1.have to 2.can 3.may 4.can/will 5.can/may
6．may 7.can 8.may 9.can 10.can/may