Unit 2How often do you exercise知识详解 人教版八年级英语上册

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Unit 2How often do you exercise知识详解 人教版八年级英语上册

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unit2 How often do you exercise
What do you usually do on weekends 周末你通常做什么?
on weekends“每逢周末”; on the weekend“在周末”,特指在某个周末
You should have a rest on weekends.你应该在周末休息一下(表泛指)
Jack will visit his uncle on the weekend.杰克这周末去看他叔叔(特指)
on weekdays“在工作日”
hardly ever几乎从不
ever起强调作用,hardly表否定。该词组通常位于系动词、助动词或情态动词后,实义动词之前,常与can、could连用
The singer is hardly ever on the stage. 这名歌手几乎不出现在舞台上
The girl could hardly say a word at that time.那个女孩当时几乎说不出话来
hard做形容词意为“困难的,坚硬的” ;做副词意为“努力地;猛烈地”
It is raining hard outside. 外面正在下大雨
I can’t finish the hard work myself. 我一个人完成不了这个艰难的工作
How often do you watch TV?
how often用来询问动作发生的频率,即动作多长时间发生一次,通常用once/twice+a+day/week/month/year sometimes、never等词回答
其中once除“一次”含义之外还有“一旦,曾经”之意;
at once意为“立刻,马上,同时” once again“再一次”
I can’t do two things at once. 我不能同时做两件事
Once again the train was late. 火车再一次晚点了
He once lived in Shanghai. 他曾经住在上海
Once he makes up his mind to do something,there is nothing can stop him.
一旦他下定决心做某事,没有什么可以阻止他
其中twice除有两次含义之外还有“两倍”之意
The new plane flies at twice the speed of the sound. 这架新飞机以两倍音速飞行.
跟Internet相关的短语:
use the Internet.上网; surf the Internet“网上冲浪,上网”; on the Internet“在网上”
You can find almost any information on the Internet. 在网上你可以找到几乎所有信息
full的用法
形容词,可意为“忙的,有很多活动的”此时full的反义词为free,“空闲的,有空的”
Are you full these days? 这些天你忙不?
当full表示“满的,充满的”时,反义词为:empty“空的”,常用短语为
be full of“充满.....” The glass is full of milk.杯子里装满了牛奶
full还有“饱的”之意,反义词为hunger“饥饿”
maybe 与may be
maybe是副词,意为“大概;或许;可能”,在句中做状语,常位于句首
may be是情态动词+be结构,意为“可能是”,在句中做位于,放在主语之后
Maybe you are right=You may be right.或许你是对的
she says it’s good for my health
be good for“对...有好处”反义词组:be bad for“对...有害”
Watching too much TV is bad for your eyes.看太多电视对眼睛不好
be good at擅长; I am good at math.我擅长数学
be good to对....好; He is good to us. 他对我们很好(表对待)
be good with与...相处的好,善于应对....
Are you good with your classmates 你和同学相处的好吗?
health健康,healthy健康的;常用短语有:
be in good/poor/bad health“身体健康/不健康”
keep in good health“保持健康”
The old man is eighty but he is still in good health.
这位老人八十岁了但身体仍然健康
As teenagers,we should do some exercise to keep in good health.
作为青少年我们应该做一些锻炼来保持健康
Here are the results.下面是结果
该局是以here开头的完全倒装句,主语是the results,放在了谓语动词are的后面
Here comes the bus. 车来了
result名词,意为“结构;后果”。常用短语the result(s) of“...的结果”
We are waiting for the result of the match. 我们在等比赛的结果
We found that only fifteen percent of our students exercise every day.
我们发现只有15%的学生每天都锻炼。
本句为主从复合句find后除可接宾语从句外,还可接复合宾语。分两种情况:
A:find+宾语+名词
We found him an honest child.我们发现他是一个诚实的孩子
I found the bed very comfortable.我发现这张床很舒服
B: find+宾语+动词ing形式
The girl found her mother crying outside.这个女孩发现她的妈妈正在外面哭
percent名词,“百分之.....”。数次加percent构成百分数,percent无复数形式 ,与名词连用时,后面需加of,此时,谓语动词的数要与of后面的名词的数保持一致
Forty percent of the students in our class like playing basketball 我们班40%的学生喜欢打篮球
Fifteen percent of the water in the lake is polluted 湖里15%的水被污染了
Although many students like to watch sports...
although连词,引导让步状语从句,相当于though“尽管,即使,虽然”
两者通常可互换;但although或though都不能与but用于一个句子中
Although my uncle is old, he looks very strong
=My uncle is old,but he looks very strong 尽管我叔叔老了,他看起来很年轻
but we think the best way to relax is through exercise.
through介词“凭借,穿过”表示动作是在某一空间内部进行的,强调从内部穿过
The train passed through the mountain quickly火车迅速通过山洞
across是副词,“横过,穿过”,表示动作是在某一物体的表明进行的,强调从一边到另一边
He passed through the hall. 他穿过大厅
I can swim across the river. 我能游到河对岸
It is healthy for the mind and the body.对身心都是健康的
mind在此处是名词,意为“心智,头脑”;做动词时意为“介意,对某事烦恼”
常用于否定句、疑问句或条件句中,后接名词、代词或动词ing形式做宾语
--Do you mind if I open the window?如果我开窗户你介意吗?
--I don’t mind it at all.一点也不介意(注:not at all一点也不)
spend、cost、pay、take做“花费”时的不同
单词/过去式 主语 常用搭配
spend/spent 人 sb+spend+时间/金钱+on sth sb+spend+时间/金钱+doing sth
cost/cost 物 sth. cost sb+金钱
pay/paid 人 “支付” sb. pay for sth. sb. pay +金钱+for sth.
take/took it It takes sb.+时间+to do(it做形式主语)
I spent 1000RMB on the computer = The computer cost me 1000RMB
=I paid 1000RMB for the computer 我花1000人民币买这台电脑
It took me twenty minutes to finish my homework. 我花了20分钟做完了作业
However,she has some bad habits,too
副词however“然而,不过”当他表示“然而”时不能直接连接两个句子,必须用逗号隔开
He lives a hard life.However,he feels happy. 他过着艰苦的生活,然而他觉得幸福
Almost every day.几乎每天
almost是副词,意为‘几乎,差不多’。位于实义动词之前,系动词、助动词或情态动词之后。且almost不能放在句末
I almost forgot to tell you the news.我几乎忘了要告诉你这个消息
There is almost nothing in the room.房子里几乎没有东西
none
none是不定代词,意为“没有一个;毫无”既可以指人也可以指物,常用“none of+名词”结构中;做主语时,谓语动词用单数或复数,常用于回答how many/much引导的特殊疑问句或含有“any+名词”的一般疑问句
None of us enjoy staying up late.我们当中没有人喜欢熬夜
no one指人,其后不能加of,做主语时谓语动词用单数,常用于回答who引导的特殊疑问句或含有anyone、anybody的一般疑问句
对话1--How many students are there in the classroom?
--None.
对话2--Is there any apples on the desk?
--None
对话3--Who is in the next room?谁在隔壁?
--No one. 没有人
单元语法:频度副词
频度副词是表示次数、频率的词,包含:always、usually、often、sometimes、hardly ever、never等(频度由高到低排列)表示具体的次数时可用once、twice、three times(三次、三倍)表示
She watches TV four times a week.她一周看4次电视
频度副词的位置
放在be动词之后
She is sometimes busy.她有时很忙
放在助动词或情态动词之后
I can never get bored watching TV. 我永远不会对看电视感到无聊
放在实义动词之前
We often play together.我们经常一起玩耍
有时频度副词可以放在句首,起强调作用
Sometimes I go to school late.有时我上学会迟到
对频度副词提问用how often
--How often do you go to the movies?你多久一次影院?
--Maybe once a month. 大概一个月一次
频度副词常用于一般现在时,表示经常或反复的动作
It often rains here in summer.这里夏天经常下雨
I always go to school by bike.我总是骑车去上学
always可以用于现在进行时和过去进行时,表示一种感叹、赞美、厌烦的情绪
He is always thinking of others.他总是为别人考虑(表赞美)
She is always borrowing money from me.她总是跟我借钱(表厌烦)

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