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Unit 3 Keep Fit . (语法讲解及专练）
【知识讲解】
一 名词性物主代词
1、物主代词的分类
物主代词是表示所有关系的动词，可分为形容词性物主代词和名词性物主代词，它有人称
和数的不同，具体用法见下表。
数 单数 复数
人称 第一人称 第二人称 第三人称 第一人称 第二人称 第三人称
形容词性
my your his her its our your their
物主代词
名词性物
mine yours his hers its ours yours theirs
主代词
含义 我的 你的 他的 她的 它的 我们的 你们的 他们的
【注意】his, its既可用作形容词性物主代词，也可用作名词性物主代词。
（本单元我们重点学习名词性物主代词的用法）
2、名词性物主代词的用法
(1)名词性物主代词在句中独立使用，相当于“形容词性物主代词+名词”，其后不能再接名
词。
My notebook is red and hers is yellow.我的笔记本是红色的，她的（笔记本）是黄色的。
her notebook
Are the balls yours?这些球是你（们）的吗？
your balls
(2)名词性物主代词在句中可作主语表语或宾语。用作主语时，谓语动词的数应随所指对象的
数而定。
This is my watch. Yours is on the desk.这是我的手表。你的(手表)在书桌上。
Your watch
-Are these your baseballs? 这些是你的棒球吗？
-No, mine are in my bag.不是,我的(棒球)在我的包里。
my baseballs
二 频度副词
1、频度副词的含义(1)表示事情发生频率的副词称为频度副词。常用的频度副词有always(总是)，usually(通
常)，often(经常)，sometimes(有时)，seldom(很少)， hardly ever(几乎从不)，
never(从不)等。这些频度副词在频率上的差异如图所示：
John always comes late. 约翰总是迟到。
He hardly ever exercises. 他几乎从不锻炼。
(2)表示频率的常用表达
①次数+a day/week/month/..
once a day一天一次
twice a year一年两次
three times a month 一个月三次
②every day/week/month/...
2.频度副词在句中的位置
频度副词一般用在实义动词之前，系动词be、助动词或情态动词之后，有时为了强调，
也可置于句首。
We never eat junk food. 我们从不吃垃圾食品。
Lucy is sometimes very busy. 露西有时很忙。
I can hardly say a word. 我几乎说不出话来。
Sometimes Jack plays computer games. 有时杰克玩电脑游戏。
Very often he goes online. 他经常上网。
Usually my father gets up early. 我爸爸通常起得很早。
【注意】always 一般不用于句首，但可用于祈使句句首。
Always remember this. 要时刻记住这一点。
3.对频度副词提问时，用 how often。
-How often do you exercise? 你多久锻炼一次?
-Hardly ever. 几乎从不。【同步检测】
1．—Steven, my ruler is broken. Can I borrow ________?
—Of course. Here it is.
A．his B．your C．yours D．you
2．This is a nice phone. Is it ________?
A．your B．her C．my D．yours
3．Your classroom is big, but ______ is bigger.
A．ours B．our C．us D．we
4．Jack, this is Alice, a friend of ________.
A．him B．yours C．her D．mine
5．________ room is on the third floor and ________ is on the fifth floor.
A．Theirs, our B．Their, our C．Their, ours D．His, her
6．________ book is new and ________ is new, too.
A．Our, he B．Ours, his C．My, his D．My, her
7．This isn’t ________ skirt. It’s ________.
A．my, hers B．mine, her C．my, her D．mine, hers
8．I’m old enough to wash ________ clothes by myself. You can also wash ________.
A．my, your B．mine, your C．my, yours D．your, my
9．—Is this your pencil case, Peter?
—No, it’s not _________. You can ask Mary.
A．mine B．his C．hers D．yours
10．—Jack, are these books ________?
—No, ________ John’s.
A．yours; it’s B．your; they’re
C．yours; they’re D．your; it’s
11．—Is that Jane’s car? —No, it’s not ________. It is ________ father’s.
A．her; her B．hers; hers C．her: hers D．hers, her
12．—Is this ________ book?
—No, it’s not ________. It’s ________.
A．you; mine; his B．your; my; her C．your; yours; mine D．your; mine; hers13．—Is this blue bag Lily’s?
—No, it’s not ________. Her bag is black.
A．her B．hers C．my D．yours
14．My schoolbag is big, but ________ is small.
A．she B．her C．he D．hers
15．—Tina can’t find ________ watch.
—Is that ________?
A．she; her B．she’s; hers C．she’s; her D．her; hers
16．Mr. Wang always goes to work by subway. But ________ he goes to work by bus.
A．sometime B．sometimes C．some time D．some times
17．She is afraid of cats. She ________ wants to keep a cat.
A．sometimes B．usually C．always D．never
18．—Do you know Douyin, Shirly?
—Of course, many people love watching videos on it, but I ________ do that.
A．seldom B．usually C．sometimes D．often
19．Walking is good for health. So I ________ walk to school.
A．seldom B．never C．sometimes D．often
20．Lucy is never late (从不迟到) for school. She is ________ the first to come to school.
A．often B．always C．usually D．sometimes
21．Sam is a nice boy. He ________ helps others in need.
A．sometimes B．often C．seldom D．never
22．My brother is a policeman. He is ______ busy.
A．always B．sometimes C．often D．never
23．—How often does your mother walk to work?
—________. But if it rains, she will take a bus to work.
A．Always B．Often C．Seldom D．Never
24．They ________ to the park on Sundays. They like the fresh air there.
A．often go B．go often C．often goes D．goes often
25．—Your grandpa is 65 years old, but he looks younger.
—Because he exercises every day and ________ stays up at night.
A．sometimes B．hardly ever C．often D．usually【真题链接】
1．（24-25七年级上·广东江门·期末）—Mum, is this ________ dress?
—No, ________ is on the bed.
A．Betty; her B．Betty’s; hers C．Betty, hers D．Betty’s; she
2．（24-25七年级上·吉林长春·期末）—Is the book under the desk ________?
—No, it is my ________. His name is on it.
A．yours; brother’s B．your; brother C．your; brother’s D．yours; brothers
3．（24-25七年级上·四川广元·期中）He is Teng Fei. ______ bag is blue.
A．He B．She C．Her D．His
4．（24-25七年级上·贵州遵义·期末）—Is that ________ ruler?
—No, ________ is on the table.
A．your; my B．yours; my C．your; mine
5．（24-25七年级上·四川成都·期中）— Is ________ notebook green?
— No, ________ is blue. Jack’s is green.
A．my, his B．your, mine C．his, my
6．（24-25七年级上·全国·期中）—Mike, is the hat on the bed ________?
—No, it’s my ________.
A．your; sister B．yours; sister’s C．your; sister’s D．yours; sister
7．（24-25七年级上·四川雅安·期中）—Are those ________ keys?
—No, they aren’t. They’re ________.
A．her, her B．her, mine C．his, she D．yours, her
8．（24-25七年级上·四川广安·期中）—Tom, is that blue pen ________?
—No, ________ pen is red.
A．yours; mine B．yours; my C．her; hers D．him; his
9．（24-25七年级上·安徽合肥·期中）—Mike, is this yellow sweater your sister’s?
—No, it isn’t. ________ is purple.
A．His B．Hers C．She’s D．He’s
10．（24-25七年级上·安徽合肥·期中）—Is this pen ________, Anna?
—Yes, it is ________.
A．your, mine B．yours, my C．his, hers D．yours, mine11．（24-25七年级上·安徽合肥·期中）— Your sister read Mencius just now. Is the book ________?
— Yes. She has the Four Books and she likes Mencius best.
A．his B．hers C．mine D．yours
12．（24-25七年级上·北京西城·期中）—It’s rainy outside. Where is ________ umbrella?
—Look! ________ is over there, near the door.
A．my; You B．mine; Yours C．my; Your D．my; Yours
13．（2024·江苏南京·三模）—Is this your English book, Daniel?
—No. You’d better ask Amy. She is looking for ________.
A．yours B．hers C．his D．mine
14．（24-25七年级上·上海浦东新·期中）In class, the teacher asks Tom to show ________ project on renewable
energy. He answers, “I’ll show ________ now.”
A．his; my B．his; mine C．him; my D．him; mine
15．（24-25七年级上·云南曲靖·期中）—Is this ________ book?
—No. Tom’s name is on it. It’s ________.
A．yours; his B．your; his C．you; he D．your; hers
16．（24-25七年级上·云南·期中）My cousin studies very hard. She is ________ the first to get to school.
A．always B．usually C．sometimes D．seldom
17．（24-25七年级上·江苏盐城·期中）—I don’t like sweets. What about you?
—Me either, but I ________ have a little to give me some energy.
A．sometimes B．often C．seldom D．always
18．（24-25七年级上·江苏泰州·期中）—You look strong and healthy. ________ do you do sport?
—I’m a fan of ball games, and I ________ play volleyball after school every day.
A．How much; often B．How long; seldom C．How often; usually D．How often; never
19．（24-25七年级上·江苏南通·期中）—Is your brother free at weekends?
—Yes. He ________ has much work to do.
A．often B．seldom C．usually D．always
20．（24-25七年级上·江苏镇江·期中）—Do you know the story of Dong Lina?
—Yes, she can’t see the world, but she ________ stops feeling the world.
A．never B．sometimes C．always D．seldom
21．（24-25七年级上·江苏连云港·期中）Sun Yingsha loves ping-pong, and she ________ practices it for over
8 hours every day.A．never B．seldom C．sometimes D．always
22．（24-25七年级上·江苏镇江·期中）—Why not ask Tim to see a film with you?
—He _______ has time to go to the cinema because he is too busy these days.
A．often B．always C．sometimes D．seldom
23．（24-25七年级上·广东广州·期中）—You look strong and healthy. ________ do you do sports?
— I ________ play basketball after school.
A．How much, often B．How often, seldom C．How often, always D．How soon, sometimes
24．（22-23七年级下·辽宁抚顺·期末）Mr. White is ________ kind, so all of the students like him very much.
A．always B．sometimes C．never D．often
25．（23-24七年级下·吉林松原·期中）—I _______ have milk for breakfast. It’s good for me. What about you?
—I _____ have it. I don’t like it at all.
A．usually; usually B．never; never C．usually; never D．never; usually
