人教版必修三Unit1语法专题练习情态动词.doc

Ⅰ.用适当的情态动词填空
1．When you cross the street, you must be careful with the passing cars.
2．It can’t be his mother, for she has been ill at home for a long time.
3．We enjoy good weather in January, but sometimes it can be terribly cold.
4．I may come to the party with you, but I am not sure.
5．When he was young, he would climb the small hill every morning.
6．—May I take this seat?
—Yes, you may/can．
7．Tom comes from Australia, so he can speak English very well.
8．If you can pass the driving test, you shall get a new car.
Ⅱ.单项填空
1．—I heard they went skating in the mountains last winter.

—It ________ be true because there was little snow there.
A．may not B．won’t
C．couldn’t D．mustn’t
解析：选C。句意：“我听说他们去年冬天去山区滑雪了。”“那不可能是真的，因为那里几乎没有雪。”couldn’t“不可能”，表示有把握的否定推测。may not“可能不”，与语境不符；won’t“不会”；mustn’t“禁止”。
2．— I haven’t got the reference book yet, but I’ll have a test on the subject next month.
— Don’t worry. You ________ have it by Friday.
A．shall B．could
C．must D．may
解析：选A。句意：“我还没拿到参考书，下个月我要参加这门科目的考试。”“别担心。周五之前你会拿到。”shall用于第二、三人称，表示允诺、威胁、警告等。
3．— Could I use your computer while you are out?
— Of course you ________．
A．could B．should
C．must D．can
解析：选D。句意：你不在时我能用一下你的电脑吗？”“当然可以。”以could开头的问句征求对方意见时，回答用can表示许可。
4．A computer ________ think for itself, it must be told what to do.
A．can’t B．couldn’t
C．may not D．might not
解析：选A。句意：电脑不会自己思考，必须指挥它怎么做。can’t“不能”，表示能力。
5．— Is John coming by bus?
— He should, but he ________ not. He likes riding his bike.
A．must B．can
C．need D．may
解析：选D。句意：“约翰要坐车来吗？”“应该是，但也可能不。他喜欢骑自行车。”表示较小的可能性用may。must not“禁止；不准”；can not“不可能”；need not“不需要”。
6．Her brother ________ be at home now, because he was seen playing basketball in the stadium just now.
A．mustn’t B．needn’t
C．can’t D．shouldn’t
解析：选C。句意：她哥哥现在不可能在家，因为刚才有人看见他正在体育场里打篮球。can’t“不可能”。
7．I often see lights in that empty house. Do you think I ________ report it to the police?
A．should B．may
C．will D．can
解析：选A。句意：我时常看见那座空房子里有灯光。你觉得我应该向警察举报吗？should“应该”，表示职责或义务，符合题意。may“可以”；will“将要；愿意”；can“可以；能够”。
8．When we were young，every evening my brother and I________ stay at home waiting for our mother to come back from work.
A．would B．might
C．should D．could
解析：选A。句意：小时候，我和我哥哥每天晚上都会在家等妈妈下班回家。would和表动作的动词连用，表示过去的一种习惯。
9．You________learn Chinese if you want to work in our company; it’s a must here.
A．should B．can
C．would D．may
解析：选A。考查情态动词。should在此意为“应该”，表示建议或劝告。句意：如果你想在我们公司工作，你得学习汉语，因为这是必须的。
10．The fire spread through the net bar very quickly but everyone ________ get out.
A．had to B．would
C．could D．was able to
解析：选D。考查could与was able to的区别。was able to可以表示在困难的情况下，经过一番周折而“能……”，并且成功地做了。could则无此种含义。
11．— The room is so dirty.________ we clean it?
— OK.
A．Will B．Shall
C．Would D．Can
解析：选B。句意：“这个房间这么脏。我们要不要打扫一下？”“好的。”shall用于第一人称为主语的问句中表示征求对方意见。
12．—________I use the dictionary to look up new words in the exam?
—I’m afraid not.
A．Would B．Should
C．May D．Will
解析：选C。考查情态动词。根据句意可知说话人在征求对方的许可，因此选择C项。句意：“我能在考试中用词典查生词吗？”“恐怕不行。”
13．— Must he come to sign this paper himself?
— Yes, he ________．
A．need B．must
C．may D．will
解析：选B。句意：“他必须过来亲自签署这份文件吗？”“是的，必须。”must可以表“推测”或“必须”，当表示“必须”时，简单答语也必须用must。
14．— Are you coming to Jeffy’s party?
— I’m not sure. I ________ go to the concert instead.
A．must B．would
C．should D．might
解析：选D。句意：“你要去参加杰弗里的宴会吗？”“不一定。我可能会去听音乐会。”由“I’m not sure.”判断，此处表示一种较小的可能性，应用might。
15．— Is Jack on duty today?
— It ________ be him, it’s his turn tomorrow.
A．mustn’t B．won’t
C．can’t D．needn’t
解析：选C。句意：“今天杰克值日吗？”“不可能是他，明天才轮到他呢。”can’t“不可能”。