2026年课堂点睛八年级英语上册人教版第20页答案
一、根据语境,用can,could,can’t,couldn’t填空。
1. —Is the boy under the tree John?
—That
can't
be John. He’s in London now!
2. When I was five, I
could
ride a bike, but I
couldn't
swim.
3. The phone is ringing. It
could
be Lisa—she always calls at this time.
4. —Can I eat ice cream after dinner, Mum?
—Yes, you
can
, but only one.
5. —
Could
you please tell me where the library is?
—Of course. It’s next to the park.

答案

1. can't 2. could, couldn't 3. could 4. can 5. Could

解析

【分析】本题考查情态动词can、could、can’t、couldn’t的用法,需结合语境判断:1. 句中提到John在伦敦,表否定推测,用can’t;2. 描述五岁时的过去能力,前半句肯定用could,后半句转折表否定用couldn’t;3. 电话响且Lisa总在此时来电,表可能性推测用could;4. 对请求的肯定回答,用can;5. 礼貌请求用Could(句首大写)。
【解析】1. 句意:树下的男孩是John吗?不可能是他,他现在在伦敦。否定推测用can’t,故填can’t;2. 句意:我五岁时,会骑自行车,但不会游泳。描述过去的能力,肯定用could,否定用couldn’t,故依次填could、couldn’t;3. 句意:电话在响,可能是Lisa,她总是这个时候打电话。表可能性推测用could,故填could;4. 句意:妈妈,晚饭后我能吃冰淇淋吗?是的,你可以,但是只能一个。对请求的肯定回答用can,故填can;5. 句意:你能告诉我图书馆在哪吗?当然,它在公园旁边。礼貌请求用Could(句首大写),故填Could。
【答案】1. can’t 2. could, couldn’t 3. could 4. can 5. Could
【知识点】情态动词用法,情态动词推测,情态动词问答
【点评】本题围绕情态动词can/could的核心用法设题,涵盖推测、过去能力、请求应答等基础场景,是初中英语情态动词的典型基础考查题,需结合语境准确区分不同情态动词的功能。
【难度系数】0.7
二、微语篇练语法 用can,could,can’t 或couldn’t 将下面的短文补充完整。
On Saturday afternoon, Mum was busy in the kitchen.
“Mum, what will you do after doing the dishes? 1.
Can/Could
Edward and I play with you?” John said.
“Sorry, I 2.
can't
play with you. Today I have lots of housework to do,” Mum said.
“Mum, we 3.
can
help you,” John said.
“OK. 4.
Could
you please water the flowers first?” Mum asked.
“Sure,” John said.
“What’s next, Mum?” John asked.
“5.
Could
you please take Edward outside to play?” Mum asked. John thought they 6.
could
play in the park, so he said yes.
After they arrived at the park, Edward asked, “7.
Can/Could
I play on the seesaw(跷跷板)?”
“Yes,” John said.
After playing for a while, John saw rubbish everywhere in the park, and he 8.
couldn't
stand it. So he said to Edward, “9.
Can/Could
you help me pick up the rubbish?”
“No problem. Let’s work together to make the park clean and tidy,” Edward said.
“I’m proud(自豪的) of you, John and Edward,” Mum said after seeing what happened in the park.

答案

1. Can/Could 2. can't 3. can 4. Could 5. Could 6. could 7. Can/Could 8. couldn't 9. Can/Could

解析

【分析】首先明确can、could、can’t、couldn’t的用法:can用于现在的请求、能力,could可表委婉请求或can的过去式;can’t表现在不能,couldn’t表过去不能。再结合每个句子的语境判断:1是请求,用委婉的Can/Could;2是妈妈现在不能,用can’t;3是现在能帮忙,用can;4、5是委婉请求,用Could;6是过去能,用could;7是请求玩,用Can/Could;8是过去不能忍受,用couldn’t;9是请求帮忙,用Can/Could。
【解析】1. 此处为John和Edward向妈妈提出一起玩的请求,用Can或Could表委婉请求,故填Can/Could;2. 妈妈因有很多家务要做,现在不能陪玩,用can’t表现在不能,故填can’t;3. John表示他们有能力帮忙,用can表现在的能力,故填can;4. 妈妈委婉请求浇花,用Could(比can更委婉),故填Could;5. 妈妈委婉请求带Edward出去玩,用Could,故填Could;6. John想到他们过去能在公园玩,用could(can的过去式),故填could;7. Edward请求玩跷跷板,用Can或Could表请求,故填Can/Could;8. John看到公园到处是垃圾,过去不能忍受,用couldn’t(can’t的过去式),故填couldn’t;9. John请求Edward帮忙捡垃圾,用Can或Could表请求,故填Can/Could。
【答案】1. Can/Could 2. can't 3. can 4. Could 5. Could 6. could 7. Can/Could 8. couldn't 9. Can/Could
【知识点】情态动词can/could的用法
【点评】本题考查情态动词can、could及其否定形式的用法,需结合语境判断请求的委婉程度和时态,属于基础语法题,侧重考查学生对情态动词基本用法的掌握。
【难度系数】0.5