2026年新课程新教材导航学八年级英语下册外研版第63页答案
情态动词专项练
一、用may、might、could、must、can't或mustn't填空
1. —Is that our new maths teacher in red?
—It
must
be her. She said she'd wear a red coat today.
2. You
mustn't
play with fire in the classroom—it's too dangerous.
3. It's 10 pm now. My sister
must
be sleeping—she always goes to bed early.
4. —Where is Jack?
—He
may/might/could
be in the library.
5. The story
can't
be true. No one has ever heard of such a thing.
6. Take an umbrella. It
may/might/could
rain this afternoon.

答案

1. must 2. mustn't 3. must
4. may/might/could 5. can't
6. may/might/could

解析

【分析】本题考查情态动词的用法,需结合句子语境判断语气类型(肯定推测、否定推测、禁止、可能性推测等):
1. 答句明确提到“她今天要穿红外套”,有确定依据,需表肯定推测;
2. 句子强调“在教室玩火危险”,需表达禁止的含义;
3. 结合“现在10点”和“姐姐总是早睡”,有确定依据,需表肯定推测;
4. 询问Jack位置无明确线索,需表不确定的可能性推测;
5. “没人听过这个事”,需表否定推测(不可能);
6. “下午下雨”是不确定情况,需表可能性推测。
【解析】
1. 由答句“She said she'd wear a red coat today”的明确依据,表肯定推测,故填must;
2. 句意为“你不能在教室里玩火——太危险了”,表禁止,故填mustn't;
3. 结合时间“10 pm”和姐姐“总是早睡”的习惯,有确定依据表肯定推测,故填must;
4. 询问Jack位置无明确线索,may、might、could均可表示不确定的可能性,故填may/might/could;
5. 由“No one has ever heard of such a thing”可知表否定推测(不可能),故填can't;
6. “下午下雨”是不确定情况,may、might、could均可表可能性,故填may/might/could。
【答案】1. must 2. mustn't 3. must 4. may/might/could 5. can't 6. may/might/could
【知识点】情态动词表推测、情态动词表禁止、情态动词的用法
【点评】本题为情态动词专项练习题,聚焦情态动词在推测、禁止等语境中的具体用法,是初中英语基础考点,需结合句子逻辑和语境判断情态动词含义,适合巩固基础。
【难度系数】0.6
二、单项选择
1. —Whose notebook is this?
—It
B
be Linda's. Her name is on the cover.
A. may
B. must
C. can
2. You
A
be hungry yet—you just ate a big lunch 20 minutes ago.
A. can't
B. mustn't
C. might not
3. —
B
this sweater be yours, Mike?
—No, it's too big for me.
A. Must
B. Can
C. Need
4. There's a knock at the door. It
A
be my dad—he usually gets home at this time.
A. must
B. can't
C. mustn't

答案

1.B 2.A 3.B 4.A

解析

【分析】这几道题均考查情态动词表推测的用法,解题时需先明确不同情态动词在肯定句、否定句、疑问句中表推测的含义,再结合每道题的语境(如是否有明确依据、句子类型)判断正确选项。
【解析】1. 句意为“——这是谁的笔记本?——一定是琳达的,封面上有她的名字”,有明确证据(名字在封面)表肯定推测,must表“一定”的肯定推测含义,故选B。
2. 句意为“——你不可能还饿,你20分钟前刚吃了一顿大餐”,根据语境需表否定推测,can't表“不可能”,mustn't表禁止、might not表“可能不”均不符合,故选A。
3. 句意为“——迈克,这件毛衣可能是你的吗?——不,对我来说太大了”,疑问句中表推测需用can,must多用于肯定推测、need不符合语境,故选B。
4. 句意为“——有人敲门,一定是我爸爸,他通常这个时候回家”,有依据(通常此时回家)表肯定推测,must表“一定”,故选A。
【答案】1.B 2.A 3.B 4.A
【知识点】情态动词表推测
【点评】本题围绕情态动词表推测的核心基础考点展开,侧重不同句式中推测含义的区分,结合语境即可快速判断,属于英语语法的常规基础题型。
【难度系数】0.7
三、按要求改写句子
1. I think he is in the music room.
He
must be
in the music room.
2. It's impossible that she will be late for class.
She
can't be
late for class.
3. Maybe we will have a class meeting tomorrow.
We
may have
a class meeting tomorrow.

答案

1. must be 2. can't be 3. may have

解析

【分析】本题考查情态动词表推测的句式转换,需根据原句的推测语气选择合适的情态动词:第1题原句是肯定推测,对应表肯定推测的情态动词;第2题原句是否定推测,对应表否定推测的情态动词;第3题原句是可能性推测,对应表可能性的情态动词。
【解析】1. 原句表达“我认为他在音乐室”,是对当前状态的肯定推测,用情态动词must表“一定”,后接be动词,故填must be;2. 原句“她上课迟到是不可能的”,是对将来状态的否定推测,用情态动词can't表“不可能”,后接be动词,故填can't be;3. 原句“也许我们明天开班会”,是对将来动作的可能性推测,用情态动词may表“可能”,后接动词原形have,故填may have。
【答案】1. must be 2. can't be 3. may have
【知识点】情态动词表推测
【点评】本题为基础句式转换题,核心考查不同情态动词在肯定、否定、可能性推测中的用法,需准确掌握情态动词的语义及搭配,难度适中。
【难度系数】0.5