内容正文:
2026年度冀教版七年级上册情态动词同步讲义
📚学习目标
1. 掌握情态动词共同语法特征,记住情态动词后接动词原形、无人称变化。
2. 掌握 `can / could` 三种含义:能力、可能性、请求许可;区分could表委婉语气和过去式。
3. 掌握 `may / might`:许可、可能性;理解might可能性比may更小。
4. 能够区分不同语境选用can/could/may/might,完成填空、句型转换、改错练习。
⚠️教学重点&难点
✅重点
1. 情态动词共性:不能单独作谓语;后接动词原形;否定加not;疑问提到句首;无人称数变化。
2. can/could:能力;推测可能性;请求许可;could语气更委婉。
3. may/might:许可;可能性,might可能性略小于may。
❌难点(高频易错重点突破)
1. ❌易错1:情态动词后加to。❌He can to swim. ✅He can swim.
2. ❌易错2:can/could表请求,could不是过去式,只是语气委婉。
>Could you open the door?(现在请求,不是过去)
3. ❌易错3:might一般不用于肯定、否定句表许可,多用于疑问句/间接问句。
4. ❌易错4:可能性辨析:`may`可能性>`might`;can用于否定、疑问句表推测。
核心知识精讲
情态动词总述
情态动词表达说话人的观点态度:需要、猜测、意愿、怀疑等。
语法特征
1. 有含义,但不能单独作谓语;
2. 后面跟动词原形;否定:情态动词+not;疑问:情态动词提到句首;
3. 无人称和数的变化,主语是三单也不用变形。
>常见情态动词:can, could, may, might, must, need, shall, should, will, would
· can / could 能;可能;可以
>can多用于现在/将来;could多用于过去。
(1)表示能力(相当于be able to)
>例句:
Can you get it for me?
You can order food on your cell phone.
I can make noodles myself.
Sorry, I can’t follow you. Please say that again.
The girl could speak English when she was a child.(过去的能力)
The street was icy — the car couldn’t stop in time.
How could the man pull a train with his teeth!
(2)表示可能性
>①肯定句:can/could表客观可能
Smoking can cause diseases of the lungs.
Some of the disadvantages can become real problems if we don’t take care.
This could be a class project!
>②否定、疑问句中can/could表猜测(教材重点)
The boy can’t be so careless.
There is someone outside. Who can it be?
It couldn’t be true.
Could it be Brian?
Where could Danny be at that time?
(3)表示请求或允许
- can 表请求:
Can you help us?
Can you send me a photo of yourself?
You can go.
- could代替can,语气更加委婉客气(不是过去时态!)
Could you open the door for me, please?
Could you speak more loudly?
Could I help you?
>💡小结:
>请求别人做事情,用Could you…?比Can you…更礼貌。
· may / might
>may、might都可表示许可、请求许可;也表现在/将来可能性;might是may的过去式。
(1)might表许可:语气委婉客气
>⚠️规则:might表许可多用于疑问句或间接疑问句,不用于肯定句、否定句。
>Might I have your email address?
>I want to know whether I might have your email address.
(2)表可能性
- may:可能性较大
- might:可能性稍小
>He may be at home.(可能)
>He might be at home.(可能性稍小)
>💡辨析:
>✅can 多用于否定、疑问句推测;
>✅may/might多用于肯定句推测。
✍分层配套练习(基础→提升→拓展)
基础层:填空,选用can/could/may/might
Ⅰ 用 can / could / may / might 填空
1. ______ you help me?(委婉请求)
2. The girl ______ dance when she was five.(过去能力)
3. It ______ rain this afternoon.(可能性较小)
4. ______ I borrow your pen?(请求许可)
5. That ______ be true.(否定推测,不可能)
提升层:句型转换(否定句、一般疑问句)
Ⅱ 改为否定句
1. You can go. → ________________________
2. He could speak French. → ________________________
Ⅲ 改为一般疑问句
1. You can order food on your phone.
________________________________________
2. I may have your email address.
________________________________________
拓展层:改错+语境辨析
Ⅳ 改错(划出错误,改正并说明原因)
1. He can to swim. ________________
2. Might I can go home? ________________
3. He might be at home, but I’m not sure.(判断正误)________
4. Could you open the door? (判断:此句是过去时态?________)
Ⅴ 单项选择
1. —______ you pass me the salt, please?
—Sure.
A. Could B. Can’t C. May
2. The light is off. He ______ be at home.
A. can’t B. may C. mustn’t
参考答案与解析
Ⅰ
1. Could(委婉请求)
2. could(过去的能力)
3. might(可能性较小)
4. May(请求许可)
5. can’t(否定推测,不可能)
Ⅱ
1. You can not (can’t) go.
2. He could not (couldn’t) speak French.
Ⅲ
1. Can you order food on your phone?
2. May I have your email address?
Ⅳ
1. to swim → swim;解析:情态动词can后面必须接动词原形。
2. Might I can go home → Might I go home;解析:情态动词不能叠加使用。
3. 正确;解析:might表可能性,可以用于肯定句。
4. 不是;解析:could此处表委婉请求,是现在时,不是过去。
Ⅴ
1. A;解析:Could you… 委婉请求。
2. A;解析:灯灭了,他不可能在家,can’t表否定推测。
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