Unit 6 情态动词专练 2025-2026学年沪教版英语七年级下册

情态动词 一、基础应用：根据语境选择适当的情态动词填空 1. You ________ (mustn’t/can’t) touch electrical appliances with wet hands—it’s against safety rules.（禁止） 2. The battery of the remote control is dead. It ________ (can’t/may) work now.（否定推测） 3. —________ (Can/May) I use your phone charger? Mine is broken. —Sure, but remember to unplug it after use.（许可） 4. This electrical socket is loose. We ________ (must/can) ask an electrician to check it.（必要义务） 5. The TV is on but no one is watching. Someone ________ (might/must) have forgotten to turn it off.（不确定推测） 6. We ________ (mustn’t/can’t) leave the air conditioner on when we go out. Saving electricity is everyone’s duty.（禁止） 7. —Who is knocking at the door? —It ________ (may/must) be my neighbor. He often comes to ask about electrical problems.（可能性推测） 8. Before using a new electrical appliance, you ________ (must/can) read the instructions carefully.（必要义务） 二、能力提升：单项选择 1. —Is the red light on the washing machine normal? —Yes, it ________ be. It just shows it’s in standby mode.（表可能性推测） A. must B. can C. may D. can’t 2. You ________ plug too many devices into one socket. It may cause a short circuit.（表禁止） A. mustn’t B. needn’t C. can’t D. may not 3. —________ I turn on the electric heater? It’s cold today. —Yes, but you ________ turn it off before going out.（许可+义务） A. Can; must B. Must; can C. May; needn’t D. Can; may not 4. The fridge is making a strange noise. It ________ be broken. We need to call a repairman.（表较确定推测） A. might B. can C. must D. may 5. —Who fixed the broken lamp in the classroom? —It ________ be Tom. He’s good at repairing electrical things.（表合理推测） A. can’t B. must C. may D. mustn’t 6. You ________ use the hair dryer near the bathtub. Water and electricity are a dangerous combination.（表禁止） A. can’t B. mustn’t C. needn’t D. may not 7. —________ the electric car be charged at this station? —No, you ________ charge it at the special charging station for electric vehicles.（许可+禁止） A. Can; mustn’t B. May; can C. Must; can’t D. Can; needn’t 8. The power is out. The elevator ________ be working. We have to take the stairs.（否定推测） A. can’t B. mustn’t C. may not D. needn’t 三、难点突破：句型转换与改错 （一）句型转换 1. It’s necessary to turn off the lights when leaving the room.（改为含must的句子） We ________ ________ off the lights when leaving the room. 2. Maybe the electrical problem is not serious.（改为含may的句子） The electrical problem ________ ________ serious. 3. You are not allowed to use the oven without adult supervision.（改为含mustn’t的句子） You ________ ________ the oven without adult supervision. 4. The fan isn’t working. Perhaps it’s out of power.（改为含might的句子） The fan isn’t working. It ________ ________ out of power. （二）易错点改错（每题仅一处错误） 1. You mustn’t be careful when using electrical tools.（禁止与义务混淆） 错误：________ 改正：________ 2. The TV remote can’t be broken—let’s try changing the battery first.（否定推测语气过强） 错误：________ 改正：________ 3. May I use your laptop? No, you may not. Please use your own.（许可否定回答不当） 错误：________ 改正：________ 4. He must be at home, because his car isn’t in the garage.（肯定推测依据不足） 错误：________ 改正：________ 四、综合运用：完成句子 1. 我们必须节约用电，因为电能是有限的自然资源。（must） We ________ ________ electricity because it is a limited natural resource. 2. 你不可以在卧室里使用大功率电器，这很危险。（mustn’t） You ________ ________ high-power electrical appliances in the bedroom—it’s very dangerous. 3. 这个电器可能需要充电了，它已经连续工作三个小时了。（may） This electrical device ________ ________ to be charged—it has been working for three hours. 4. 他不可能忘记关空调了，他总是很注意节约用电。（can’t） He ________ ________ forgotten to turn off the air conditioner—he always pays attention to saving electricity. 5. 我可以借用一下你的充电器吗？我的昨天坏了。（can） ________ I ________ your charger? Mine broke yesterday. 五、单元主题语篇填空：用适当的情态动词填空 Yesterday, my family did a safety check on electrical appliances at home. First, we checked the sockets. Dad said we ________ (mustn’t/can’t) plug more than three devices into one socket, or it ________ (may/must) cause a short circuit. Then we looked at the old lamp in the living room. It ________ (can’t/might) be safe to use because the wire was broken. We ________ (must/can) replace it with a new one at once. My sister asked if she ________ (can/must) use the hair dryer in the bathroom. Mom told her she ________ (mustn’t/can’t) because the bathroom is wet—electricity and water ________ (may/must) be a dangerous combination. Finally, we checked the air conditioner. It was making a strange sound. Dad said it ________ (might/must) be a problem with the fan, but it ________ (can’t/may not) be too serious. We ________ (can/must) call a repairman to check it next week. This safety check taught us that we ________ (must/can) always follow electrical safety rules to keep ourselves safe. 参考答案&考点解析 一、基础应用 1.mustn’t 2. can’t 3. Can/May 4. must 5. might 6. mustn’t 7. may 8. must 二、能力提升 1. C 解析：表“可能是正常的”，语气不确定，用may，故选C 2. A 解析：禁止将多个电器插在一个插座，用mustn’t，故选A 3. A 解析：第一空表许可用Can/May，第二空表义务用must，故选A 4. C 解析：冰箱发出奇怪噪音，较确定推测“一定坏了”，用must，故选C 5. B 解析：Tom擅长电器维修，合理推测“一定是他”，用must，故选B 6. B 解析：禁止在浴缸附近使用吹风机，用mustn’t，故选B 7. A 解析：第一空表许可用Can，第二空表禁止用mustn’t，故选A 8. A 解析：停电了，否定推测“电梯不可能在运行”，用can’t，故选A 三、难点突破 （一）句型转换 1.must turn 2. may not be 3. mustn’t use 4. might be （二）易错点改错 1. mustn’t→must（需表达“必须小心”，而非禁止） 2. can’t→might not（表不确定的否定推测，用might not更合适） 3. may not→can’t/had better not（may not语气委婉，此处需明确拒绝，用can’t更恰当） 4. must→may/might（仅凭车不在车库不能确定“一定在家”，用may/might表推测） 四、综合运用 1.must save 2. mustn’t use 3. may need 4. can’t have 5. Can; borrow 五、单元主题语篇填空 mustn’t; may; can’t; must; can; mustn’t; may; might; can; must 学科网（北京）股份有限公司 $