Unit2 Section B知识总结- 人教版八年级上册英语

1、Unit2 How often do you exercise?Section B junk food 垃圾食品 green food 绿色食品 natural food 天然食品health n 健康healthy adj 健康的(反)unhealthy healthily adv 健康地keep healthy = keep fit = stay healthy=keep in good health 保持健康Doing sports can help us keep _(health)They eat very _(health). Mike is good for our _(heal

2、th).how many 多少，后跟名词复数，用于对可数名词的数量提问。( )-How many _ are there in your basket,Jeff? -Only three.A.rice B.orange C.eggs D.fruit how much 多少，后接不可数名词，可对不可数名词的数量或价格提问。 How much meat do you want? How much is the bike?try v 试图，设法，努力 【拓展】 try on 试穿 try to do sth 努力做某事 try doing sth 试图做某事 try ones best to do

3、sth= do ones best to do sth 尽某人最大努力做某事We should _(尽最大努力)to be happy in the future.5.although=though conj 虽然，即使;不能与but 连用，引导让步状语从句( ) _ he isnt rich enough,he often gives away money to some poor children.A.Though B.When C.Because D.If( ) _ he is very tried,he still tries _. A.Because ;work B.Because;

4、to work C.Although;working D.Although;to work6.want sb to do sth= would like to do sth 想要某人做某事ask sb to do sth 请求某人做某事 tell sb to do sth 告诉某人做某事（ ）My parents want _ a doctor. A.me to be B.me be C.to me be D.be7.(1)be good for 对有好处，对.有益（反）be bad for 对有害( ) She says milk is _her health and she drinks

5、it every day. A.good to B.good for C.well for D.good at (2)be good at = do well in +n/doing 擅长于做某事 My brother is really good at baseball.(3)be good to =be friendly to=be kind to 对. 友好( ) Its not good _ your health to play computer games so much.A. with B.in C.for D.on( ) Running is good _ your healt

6、h. A.at B.to C.for D.with8.look after=take care of 照顾短语:look for 寻找 look like 看起来像 look out 小心 look around 环顾look up 向上，查字典 look over 检查 look at 看( ) -Can you _ my dog when I go out?- Sure. A.look like B.look after C.look for D.look at( ) We must _ our eyes.A.look up B.look at C.look after D.look fo

7、r( )My mother is ill,so I have to _her at home. A.look at B.look after C.look for D.look around9.help v 帮助helpful adj 有帮助的help sb(to) do sth=help sb with sth 帮助某人做某事 My mom helps me_(do) my homework.=My mom helps me with my homework.My teachers words are _(help) to me.( )A lot of vegetables can help

8、 us _ in good _. A.keep;health B.to keep; healthy C.keeping ;health D.keeps;health10.different adj 不同的differently adv 不同地difference n 不同点be different from= be not the same as 与.不同 (反) the same as -Whats the _ between the two computers?- There are some _in price and quality.(different)( ) Are his eat

9、ing habits the same as _? A.you B.your C.yours D.yourself( ) My lifestyles is _ from your brothers . - Yes.There are some _. A.different;different B.difference;different C. different;differences 11.maybe =perhaps adv 也许，可能，通常用于句首，在句中作状语。Maybe you left your book at home.may be 是“情态动词+be动词原形”构成的谓语形式，“

10、可能，也许”，可以和maybe 互换。Toms pen may be in his backpack.=Maybe Toms pen is in his backpack. 12.（1）keep 连系动词 ，后接形容词“保持，使保持某种状态”keep healthy 保持健康（2）keep +名词/代词+形容词” 保持状态”Keep your eyes closed (3) keep sb doing sth 使某人不停地做某事Dont keep me waiting for long.(4) keep v “保管某物How long can I keep the dictionary.13.

11、less adj 更少的 (修饰不可数名词) little less least You should eat less meat.( ) Were try our best to do the work with _ money and _ people.A.few,little B.a few ,a little C.less,fewer D.fewer,less14.a lot of =lots of 许多，大量 a lot of +可数名词复数=many a lot of +不可数名词= much（ ） There is a lot of snow in the north of Ch

12、ina in winter.（ ）The students have lots of homework to do every day.A.many B.much C.a lot D.lot of 15.must/have to 必须(1)must 强调主观看法，无时态变化 I must do my homework before I go out.(2) have to 强调客观需要，有时态和人称的变化，第三人称单数形式为has to ,过去式为had toI have to go to a meeting.单元短语集锦：how often 多久一次 2.how soon 多久以后3.how

13、 many times 多少次 4.hardly ever 很少5.once or twice 一两次 6.as for 至于7.junk food 垃圾食品 8.keep healthy/stay healthy 保持健康9.eating habits 饮食习惯 10.try to do sth 尽力做 11.try doing sth 尝试做 12.two or three times 两三次 13.surf the Internet 上网 14.the result of 的结果 15.be different from 与不同 16.keep something +adj 保持某物.1

14、7. be good to 对.好 18.a healthy lifestyle 一个健康的生活方式19.on weekends 在周末 20.of course 当然21.look after/take care of 照顾 22.get good grades 取得好成绩23.be good for 对.有好处 24.help sb to do sth 帮助某人做某事小作文：How do I keep healthy?I am a middle school student. Im very healthy.I get up early every morning and do some exercise.My eating habits is very good.I often e