人教版(2024)七年级下册英语Unit 3 Keep Fit单元语法讲义(含答案)

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人教版(2024)七年级下册英语Unit 3 Keep Fit单元语法讲义(含答案)

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2025 年新版人教版七年级下册英语 Unit 3 Keep Fit 单元语法讲义
一、重点词汇用法
fit
形容词:意为 “健康的;健壮的”,常构成短语 “keep fit(保持健康)” ,如:To keep fit, we should exercise regularly.(为了保持健康,我们应该定期锻炼)。
动词:“适合”,例如:This pair of shoes fits me perfectly.(这双鞋非常适合我);还可表示 “安装”,如:They are fitting a new lock on the door.(他们正在给门安装新锁)。
hardly
副词:“几乎不;几乎没有”,表否定,常位于实义动词前,助动词、be 动词或情态动词后 。如:He hardly speaks in class.(他在课堂上几乎不发言) ,She can hardly believe her eyes.(她几乎不敢相信自己的眼睛)。
ever
副词:“在任何时候;从来;曾经”,用于疑问句、否定句或条件句等 。如:Have you ever been to the Great Wall (你曾经去过长城吗?) ,I hardly ever eat fast food.(我几乎从不吃快餐)。
once
副词:“一次;曾经” ,常用于表示频率,如:I go to the library once a week.(我每周去一次图书馆) ;也可表示过去的经历,如:I once met a famous singer at the airport.(我曾经在机场遇到过一位著名歌手)。
连词:“一旦” ,引导条件状语从句,如:Once you make a promise, you should keep it.(一旦你许下诺言,就应该遵守它)。
twice
副词:“两次;两倍” ,用于描述次数或倍数 ,如:I visit my grandparents twice a month.(我每月看望我的祖父母两次) ,This box is twice as heavy as that one.(这个箱子是那个箱子的两倍重)。
maybe
副词:“也许;大概”,一般位于句首,修饰整个句子 。如:Maybe it will snow tomorrow.(也许明天会下雪) ,Maybe he is late for some reason.(也许他因为某种原因迟到了)。
seldom
副词:“很少;不常”,表频率低,位于实义动词前,助动词等后 。如:He seldom goes to the cinema.(他很少去看电影) ,She seldom eats meat.(她很少吃肉)。
instead
副词:“反而;代替”,常位于句末,“instead of(而不是)” 后接名词、代词或动名词 。如:I didn't have coffee. Instead, I had tea.(我没有喝咖啡,而是喝了茶) ,She went to the park instead of staying at home.(她去了公园而不是待在家里)。
encourage
动词:“鼓励;激励”,常用于 “encourage sb. to do sth.(鼓励某人做某事)” 结构 。如:Our teacher always encourages us to ask questions.(我们的老师总是鼓励我们提问) ,His parents encourage him to pursue his dreams.(他的父母鼓励他追求自己的梦想)。
succeed
动词:“成功;达到目标”,“succeed in doing sth.(成功做某事)” 。如:She succeeded in winning the competition.(她成功赢得了比赛) ,He finally succeeded in getting a job.(他最终成功找到了一份工作)。
二、重点短语
keep fit:保持健康,如:Doing exercise every day is a good way to keep fit.(每天锻炼是保持健康的好方法)。
play baseball:打棒球,如:They often play baseball on weekends.(他们经常在周末打棒球)。
jump rope:跳绳,如:The children are jumping rope in the playground.(孩子们正在操场上跳绳)。
go jogging:去慢跑,如:My father likes to go jogging in the morning.(我爸爸喜欢早上慢跑)。
do sit - ups:做仰卧起坐,如:He does sit - ups every morning to strengthen his muscles.(他每天早上做仰卧起坐来增强肌肉)。
a few:几个;一些,修饰可数名词复数 ,如:There are a few books on the desk.(桌子上有几本书)。
look after:照顾;照料,如:You should look after your pet carefully.(你应该细心照顾你的宠物)。
instead of:代替;而不是,如:I'll have an apple instead of a banana.(我要吃一个苹果而不是香蕉)。
belong to:属于,如:This bike belongs to my brother.(这辆自行车属于我哥哥)。
make sure:确保;保证,如:Make sure you have turned off all the lights before leaving.(在离开之前确保你已经关掉了所有的灯)。
三、重点句型
How often do you exercise :你多久锻炼一次?
回答用频度副词或短语,如 “Once a week.(一周一次)” ,“Twice a month.(一个月两次)” ,“Every day.(每天)” 。
It's important to keep fit.:保持健康很重要。
类似结构还有 “It's + 形容词 + to do sth.”,如:It's necessary to drink enough water every day.(每天喝足够的水是必要的) 。
What sports do you like best :你最喜欢什么运动?
回答如 “I like basketball best.(我最喜欢篮球)” ,“My favorite sport is swimming.(我最喜欢的运动是游泳)” 。
I think you should exercise more.:我认为你应该多锻炼。
“should” 后接动词原形,表示建议,如:I think you should get enough sleep.(我认为你应该有足够的睡眠) 。
四、语法知识
(一)频度副词
常见频度副词:always(总是),usually(通常),often(经常),sometimes(有时),seldom(很少),hardly ever(几乎从不),never(从不)。
位置
实义动词前:He always gets up early.(他总是早起) ,She often goes to school on foot.(她经常步行去上学)。
be 动词、助动词或情态动词后:I am usually busy on weekdays.(我工作日通常很忙) ,They have never been to the beach.(他们从未去过海滩) ,You should sometimes listen to music to relax.(你有时应该听音乐放松一下)。
对频度副词提问:用 “How often...” ,如:How often do you watch TV (你多久看一次电视?) 。
(二)物主代词
形容词性物主代词:my(我的),your(你的;你们的),his(他的),her(她的),its(它的),our(我们的),their(他们的;她们的;它们的)。
用法:后面必须接名词,作定语 ,如:This is my bag.(这是我的包) ,Their classroom is very clean.(他们的教室非常干净)。
名词性物主代词:mine(我的),yours(你的;你们的),his(他的),hers(她的),its(它的),ours(我们的),theirs(他们的;她们的;它们的)。
用法:相当于 “形容词性物主代词 + 名词”,后面不能接名词,可作主语、宾语或表语 ,如:This book is mine.(这本书是我的) ,The pen is yours.(这支笔是你的) ,These toys are theirs.(这些玩具是他们的)。
(三)情态动词 should 的用法
表示建议:意为 “应该” ,后接动词原形 ,如:You should study hard to get good grades.(你应该努力学习以取得好成绩) ,We should eat more fruits and vegetables.(我们应该多吃水果和蔬菜)。
否定形式:shouldn't ,表示 “不应该” ,如:You shouldn't stay up too late.(你不应该熬夜太晚) ,They shouldn't waste water.(他们不应该浪费水)。
一般疑问句:把 should 提到句首 ,如:Should I tell him the truth (我应该告诉他真相吗?) ,肯定回答 “Yes, you should.” ,否定回答 “No, you shouldn't.” 。
五、相关练习
(一)词汇练习
写出下列单词的适当形式
fit(现在分词)_________
hardly(反义词)_________
once(基数词)_________
they(名词性物主代词)_________
succeed(名词)_________
用所给词的适当形式填空
We need to do more exercise to keep _________ (fit).
He _________ (hardly) ever eats junk food.
I go to the library _________ (two) a week.
This book is _________ (my).
Our teacher encourages us _________ (read) more books.
(二)短语翻译
保持健康 _________
打棒球 _________
跳绳 _________
去慢跑 _________
做仰卧起坐 _________
几个;一些 _________
照顾;照料 _________
代替;而不是 _________
属于 _________
确保;保证 _________
(三)句型转换
I exercise every day.(对划线部分提问)
_________ _________ do you exercise
This is my basketball.(改为同义句)
This basketball _________ _________.
You should drink more water.(改为否定句)
You _________ _________ more water.
He usually goes to school by bike.(改为一般疑问句)
_________ he usually _________ to school by bike
(四)语法选择
1.-_________ do you go to the movies
-Once a month.
A. How long B. How often C. How soon D. How many
2.This is _________ eraser. _________ is in the pencil - box.
A. my; Hers B. mine; Her C. my; Her D. mine; Hers
3.You _________ eat too much junk food. It's bad for your health.
A. should B. shouldn't C. need D. needn't
4.My father often encourages me _________ new things.
A. try B. to try C. trying D. tried
(五)写作练习
以 “My Favorite Sport” 为题,写一篇短文,介绍你最喜欢的运动。要求:包含运动的好处、你多久做一次这项运动以及你喜欢它的原因等,不少于 50 词 。
练习答案
(一)词汇练习
fitting; almost; one; theirs; success
fit; hardly; twice; mine; to read
(二)短语翻译
keep fit
play baseball
jump rope
go jogging
do sit - ups
a few
look after
instead of
belong to
make sure
(三)句型转换
How often
is mine
shouldn't drink
Does; go
(四)语法选择
B 2. A 3. B 4. B
(五)写作练习(参考范文)
My Favorite Sport
My favorite sport is swimming. It is really interesting and good for my health. Swimming can make me strong and keep me fit.
I go swimming twice a week, usually on weekends. I enjoy the feeling of swimming in the cool water, especially in summer. It makes me feel relaxed and forget all the troubles. Also, I can make some new friends at the swimming pool. That's why I love swimming so much.

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