人教版七年级下册第3单元Unit 3 Keep Fit 重点语法及练习题(含答案)

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人教版七年级下册第3单元Unit 3 Keep Fit 重点语法及练习题(含答案)

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人教版七年级下册第 3单元重点语法及练习题
1. 物主代词(Possessive Pronouns)
(1)形容词性物主代词(my, your, his, her, its, our, their)必须后接名词,不可单独
使用。
例句 1:This is my baseball glove.这是我的棒球手套。
例句 2:Their running shoes are new.他们的跑鞋是新的。
(2)名词性物主代词(mine, yours, his, hers, ours, theirs)可独立使用,相当于“形容
词性物主代词 + 名词”。
例句 1:The ping-pong bat is yours.这个乒乓球拍是你的。
例句 2:The mat is not hers; it’s theirs.这个垫子不是她的,是他们的。
(3)易混淆点:不可混淆 its(它的,形容词性)和 it’s(it is 的缩写)。
错误:The dog wagged it’s tail.
正确:The dog wagged its tail.狗摇了摇它的尾巴。
练习题:
1.用名词性物主代词改写句子:
This is her skateboard. → This skateboard is ______.
Are those our jump ropes → Are those jump ropes ______
(答案:hers / ours)
2. 频率副词(Adverbs of Frequency)
(1)位置规则:放在实义动词前,be动词后。
例句 1:She usually plays tennis.她通常打网球。
例句 2:They are always late.他们总是迟到。
(2)短语频率(如 three times a week)通常放在句尾。
例句:I go jogging three times a week.我每周慢跑三次。
(3)程度排序:
Always (100%) > Usually (80%) > Often (60%) > Sometimes (30%) > Seldom
(10%) > Never (0%)
(4)特殊用法:Never 表示否定,句子无需再加 not。
错误:I don’t never eat sweets.
正确:I never eat sweets.我从不吃甜食。
练习题:
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人教版七年级下册第 3单元重点语法及练习题
将频率副词填入正确位置:
He (sometimes) ______ forgets his keys.
They (hardly ever) ______ watch TV.
(答案:sometimes forgets / hardly ever watch)
3. 疑问词 “Whose”
(1)用于询问所有权,后接名词或单独使用。
例句 1:Whose basketball is this (这是谁的篮球?)
例句 2:Whose is this volleyball (这个排球是谁的?)
(2)回答方式:使用名词性物主代词或名词所有格(’s)。
例句:It’s mine. / It’s Peter’s.(它是我的。/ 它是彼得的。)
(3)易混淆点:区分 whose(谁的)和 who’s(who is 的缩写)。
错误:Who’s skateboard is this
正确:Whose skateboard is this
4. 现在简单时态(Present Simple Tense)
(1)用法:
1 表示习惯性动作(I play badminton every day)。
2 表示客观事实(Water boils at 100°C)。
(2)第三人称单数规则:
1 一般动词加 -s(play → plays)。
2 以 -s, -sh, -ch, -x, -o结尾的动词加 -es(watch → watches)。
3 以辅音字母 + y结尾的动词,变 y为 i加 -es(study → studies)。
(3)否定句与疑问句:
否定句:He does not (doesn’t) like baseball.
疑问句:Does she play tennis
练习题:
1.将动词改为正确形式:
She (study) ______ English every night.
My brother (wash) ______ his shoes on Sundays.
(答案:studies / washes)
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人教版七年级下册第 3单元重点语法及练习题
5. 祈使句(Imperative Sentences)
(1)结构:
1 肯定:动词原形开头(Keep fit!)。
2 否定:Don’t + 动词原形(Don’t talk!)。
(2)使用场景:
1 给出指令(Pass me the ball.)。
2 提出建议(Try jogging in the morning.)。
3 隐含主语:祈使句的主语默认为 you,但通常省略。
练习题:
1.将句子改为祈使句:
You should drink more water. → ______ more water!
You must not eat here. → ______ here!
(答案:Drink / Don’t eat)
6. 连词 “because” 引导原因状语从句
(1)用法:连接原因和结果,回答“为什么”。
例句:I like baseball because it’s exciting.(我喜欢棒球因为它很刺激。)
(2)位置灵活性:
Because从句可放在主句前或后,但需用逗号分隔。
例句 1:Because it’s fun, I play ping-pong.
例句 2:I play ping-pong because it’s fun.
(3)避免重复:
错误:I like it because because it’s healthy.
正确:I like it because it’s healthy.
练习题:
1.用 because合并句子:
She exercises every day. She wants to keep fit.
→ She exercises every day ______.
(答案:because she wants to keep fit.)
7. 动词短语搭配(Play, Go, Do)
(1)Play + 球类运动(play football / basketball / tennis)。
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人教版七年级下册第 3单元重点语法及练习题
(2)Go + 动词-ing(go swimming / jogging / skating)。
(3)Do + 非球类运动或泛指锻炼(do yoga / exercise / gymnastics)。
(4)特殊搭配:
Work as a team(团队合作)。
Jump rope(跳绳,固定短语)。
练习题:
1.选择正确动词完成句子:
Let’s ______ (play/go) skating this weekend!
She ______ (does/goes) yoga every morning.
(答案:go / does)
综合应用练习
根据教材内容填空(Page 3 2a):
Emma: There is a ______ here. Is it ______
Jim: No, it isn’t ______. Is it Ella’s
Emma: No, ______ is ______.
Jim: Maybe it’s Yaming’s.
Emma: Hi, Yaming! Is this your bat
Yaming: Oh yes, it’s ______. Thanks!
(答案:bat / yours / mine / hers / red / mine)
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