Unit2StayHealthyGrammarFocus课件-人教版八年级英语下册

Unit2StayHealthy(新人教)英语八年级下册GrammarFocus(4a-4c)如果你想解决这个问题，一个面对面的谈话效果最佳。Ifyouwanttosolvetheproblem,aface-to-facetalkusuallyworksthebest.如果你不注意你的用语，发送短信会让事情变糟。Textingcanmakethingsworseifyouarenotcarefulwithyourwords.如果排练在晚上7点结束，我将会在7点15分来接你。Iftherehearsalendsat7:00p.m.,Iwillpickyouupat7:15p.m.如果ReviewLet’stalkabouttheirtheirhealthproblems.What’swrongwithDavid?Heatetoomuchlastnight.Nowhis________________.stomachachesWhatshouldhedo?He__________eatsomuchnexttime.shouldn'tWhat’sthematterwithNancy?Shehasareallybad___________.Whatshouldshedo?toothacheShe________seethedentistandgetanX-ray.She________eatsomesoftfoodfornow.couldHowdidJeffhurthimself?He____________whenhefelloffhisbike.Whatshouldhedo?He________bemorecarefulnexttime.shouldhurthimselfshould

Presentation4aUnderlinethemodalverbsforadvice.02知识导图·思维引航

can/could表征求意见或提出请求、表许诺命令等语气should表责任或义务may/mightmust/havetoneed

情态动词haveto表必须，不得不表能力；表许可或请求；表推测must表必须，表推测must与haveto的区别表许可，表可能性；表祝愿情态动词，后接动词原形实义动词，后接动词不定式should表委婉劝告等should表推测should表惊讶愤怒等oughtto表责任和义务表建议劝告-意为“最好”表过去常常做某事shallshould/oughttohadbetterwill/would表意愿;表请求允许或建议;表习惯或特征;表可能性等usedtodare情态动词，后接动词原形实义动词，后接动词不定式

情态动词的特点

情态动词无人称和数的变化(haveto除外)。个别情态动词有现在式和过去式两种形式。情态动词的否定式在其后加not;haveto除外情态动词后接动词原形。具有助动词的作用，可用来构成否定句、疑问句及用于简明答语。1.can/could的用法（1）表示能力，意为“能；可以”(could表示过去的能力)。IcanreadthissentenceinEnglish.Icouldseeshewaslonely.（2）表示请求/许可。(could表委婉,答语中避免使用could来回答。)Can/CouldIhavealookatyournewpen?Can/Couldyoulendmeahand?（3）用于推测，意为“可能”，could比can更加不肯定,can’t不可能Hecan't/couldn'tbeoversixty.Itcan/couldbeadog.（4）比较委婉客气地陈述看法。我能用英语读这句话。我能看出她很寂寞。我能看看你的新钢笔吗？你能帮我一下吗？他不可能超过六十岁了。它可能是只狗。你可以吃一些软的食物。Youcouldeatsomesoftfood.2.should的用法‌（1）表示义务责任；建议劝告，意为“应该”，用于各种人称。你应该对老师有礼貌。你应该看牙医并拍X光片。（2）表示推测，意为“想必，估计”等。Theyshouldbehomebynow.

Youshouldbepolitetoyourteachers.他们现在应该在家。YoushouldseeadentistandgetanX-ray.polite3.may/might的用法用法解释示例

意为“可以”，might语气更委婉。表示给予许可时可用may/can，但不能用might。may/might开头的疑问句，肯定回答用can，否定回答用mustn't/can't/hadbetternot。—MayIspeaktoLaura,please?请问我能和劳拉通话吗?—Yes,youcan.是的，你可以。

意为“也许，可能”，表示把握性不大的推测，might的可能性比may小。Amymightcometojoinusthisafternoon,butI'mnotsure.艾米今天下午可能来加入我们，但我不确定。只能用may，且may常位于句首，“May+主语+动词原形”。Mayyouhavegoodluck!祝你好运!

注：may的否定式是maynot，意为“可能不”。表示“不许，禁止”等含义时，常用mustn’t。表许可”可以“表推测”可能“表祝愿”祝..“4.must的用法（1）“必须”(主观意志)Allstudentsmusthandintheirhomework.注意：用must提问，肯定回答用______，否定回答用_______。—MustIcleantheclassroomnow?—Yes,you______./No,you_____.（2）表示推测，暗含很大可能性，意为“一定”等，只用于肯定句。Hemustbeill.（3）mustn’t意为“禁止”Childrenmustn'tplaywithfire.mustneedn't/don'thavetoneedn’tmust

他一定是病了。孩子们禁止玩火。所有学生必须上交他们的作业。Ⅰ.单项选择(

)1.

yougivemeahand?Ican’tmovetheboxbymyself.

A.Can’t B.Could C.Should D.Need(

)2.—Somepeopledon’tshowtheirtalentsintheverybeginning.—Iagree.EvenEinstein

readuntilhewasseven.

A.can’t B.mustn’t C.needn’t D.couldn’t(

)3.[人与自我·学习方法]—Mymathsisalittlepoor.Canyougivemesomeadvice,Amy?—Ithinkyou

listentoyourmathsteachercarefullyinclass.

A.mustn’t B.should C.would D.canBDB《金牌》P221-5(

)4.[人与自我·安全意识]Tokeepchildrenawayfromdangerduringthecomingsummerholiday,parents

givethemsomesafetytips.

A.should B.may C.could D.might(

)5.Westudents

beafraidofproblemsifwewanttomakeourdreamscometrue.

A.should B.shouldn’t C.may D.maynotABCompletethepassagewithshould,shouldn’t,orcould.4c

PracticeMobilephonesareuseful,butyou_______usethemwisely.Toprotectyoureyes,every20minutes,you_______restyoureyesandlookatsomethingfaraway.What’smore,you_______changeyourscreen’sbrightnesstotryandmatchyourenvironmentandmakethewordsonthescreenbigger.Ofcourse,you_______lookatyourphonejustbeforeyougotobed,andyoucertainly_______lookatitwhenyoucrosstheroad!Infact,you_______avoidusingyourphonetoooften.You_______listentomusicinsteadofwatchingvideos.You_______alsotalktoyourfriendsinsteadofsendingthemmessages.shouldshouldshould/couldshouldn’tshouldn’tshouldcouldcould远处的东西更重要的是，过马路avoiddoingsth.避免做...代替，而不是sendsb.messages给某人发短信如果你想解决这个问题，一个面对面的谈话效果最佳。Ifyouwanttosolvetheproblem,aface-to-facetalkusuallyworksthebest.如果你不注意你的用语，发送短信会让事情变糟。Textingcanmakethingsworseifyouarenotcarefulwithyourwords.如果排练在晚上7点结束，我将会在7点15分来接你。Iftherehearsalendsat7:00p.m.,Iwillpickyouupat7:15p.m.如果ReadandthinkWhatisthefunctionofthesentencesineachcolumn?DescribehealthproblemsAskabouthealthproblemsGiveadviceWhat’swrong?Iatetoomuchlastnight.Nowmystomachaches.Youshouldn’teatsomuchnexttime.What’sthematter?Ihaveareallybadtoothache.YoushouldseethedentistandgetanX-ray.Youcouldeatsomesoftfoodfornow.Howdidyouhurtyourself?IhurtmyselfwhenIfelloffmybike.Bemorecarefulnexttime.Ifwearenotcareful,wecaneasilyhurtourselves.4a

Readandcirclethereflexivepronouns(反身代词).反身代词是一种表示，可译为“本人”“本身”hurtoneself

accidentscutoneself

反身代词是一种表示反射或强调的代词，可译为“本人”“本身”第一人称第二人称第三人称单数复数myselfourselvesyourselfyourselveshimselfherselfitselfthemselves口诀：一二物主，三宾格。P105Learntheusageofthereflexivepronouns.用法（1）作宾语ShetaughtherselfEnglish.她自学了英语。Theyshouldlearntolookafterthemselves.

他们应该学着照顾自己。Thelittleboywenttoschoolbyhimself.那个小男孩自己去上学了。（2）作同位语：用于强调。Hehimselfbuiltthehouse.他自己建造了那座房子。YoushouldgoandaskTomhimself.你应该去问问汤姆本人。反身代词不能单独作主语，需与主语保持人称、数的一致。❌Myselfwenttothehospital.（反身代词不能作主语）

。（3）作表语：

用来描述身体或精神方面的感觉或状态。Justbeyourself.做好你自己。短语hurtoneself伤到自己teachoneself/learnbyoneself自学enjoyoneself过得愉快byoneself独自；单独helponeself(to)...随便吃/喝……cometooneself苏醒dressoneself给自己穿衣服loseoneselfin沉迷于..talktooneself自言自语believeinoneself相信自己Learntheusageofthereflexivepronouns.Theboyistooyoungtodress_______(he).I'llwaitfor____A___atthegate.A.themB.themselvesC.theyD.their3.Thecatcleaned___B____withitstongue（舌头）.A.itB.itselfC.its4.Tom,thiscakeisdelicious.Didyoumakeitfor___B____?A.ourselvesB.usC.ourD.wehimself

Pract