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Unitl情态动词can用法专练
一、单项选择
1. —Can you come and play basketball with us? —_____ . I have a lot of homework to do.
A. Sure
B. Yes, I do
C. No, I don can 't
2. My bike is broke n today, and I ___ go to school on foot.
A. have to
B. must
C. n eed
3. Excuse me. Could you read the story aloud, please? I _
A. can 't
B. must n 't
C. have to
4. —You ___ w atch TV here. The baby is sleep ing now. —I ' m sorry. I ' ll go to the next room,
A. can
B. can f
C. must
5. —__ you come to my birthday party this weeke nd? —I ' m afraid I ______ . I have to look after my sister. A. Can; can B. Must; must C. Must; must n t D. I ' m sorry, I
D. has to
hear you.
D. n eedn' t
D. have to 't D. Can; can 't
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参考答案及解析
1. D 由答语后句I have a lot of homework to do我有许多作业要做。）可知此处应
作否定回答，排除A、B两项；Can you come….?为提出邀请的句式，否定回答常用I ' m sorry, I can ' t.+表示理由的句子。
2. A 自行车坏了是客观因素，故用have to。
3. A 由题意可知“我不能听见”，故应用can ' t 。
4. B 由下文可知应是“你不能在这里看电视” ，故选B。
5. D 句意：“你这周末可以参加我的生日聚会吗？” “我恐怕不能。我得照看我
妹妹。”根据句意可知，问句表示请求，应该用can；由“ I have to look after my sister. 可知，应为否定回答，故选D。 must意为“必须；一定”。
