Unit4SectionAGrammarFocus课件人教版七年级英语上册

1Unit4

MyfavouritesubjectPeriod5GrammarFocus2Attheendofthisperiod,youwillbeableto:summarizetheusageofconjunctionssuchasand,but,because,orandso;useconjunctionsand,but,because,orandsocorrectly;understandtheclassificationofconjunctionsandusethemcorrectly.LearningObjectivesReadthesentences.Findoutwhentouseand,but,andbecause.Thencompletethestatementswithand,but,orbecause.3abecauseandbut3Matchthetwopartstomakesentences.1.

Ihaveabicycle,

A.

andheoftenhelpsmewithmyEnglish.2.

IliketolearnaboutIT

B.

becauseIliketravelling.3.

Shelikestolistentomusic

C.

butIlikemyartteacheralot.4.

HeisgoodatEnglish,

D.

anddrawpictures.5.

Myfavouritesubjectisgeography

E.

butIoftenwalktoschool.6.

Idon’tlikedrawing,

F.becauseit’sfuntolearntousecomputers.3bEFDABC4连词and

“and”连接两个并列成分①“和”，否定句中用or。但如果前后名词都用no修饰，则可以用and。The air was so warm and bright.It has no feet or legs./I have no sister or brother.It has no eyes and no ears. ②“然后”。用于连接两句有时间先后的句子。She washed the dishes and dried them. 5③表示目的、意图。用于go, come, stop, run, stay等动词后。Come and have a drink.Go and buy one. ④“只要...就会...”、“如果...那么...”。

用于祈使句后，表示条件与结果的关系，“祈使句,+and+句子”。Knock on the door, and it will be opened. Come late again, and you’ll be fired.6连词and

连词but①表转折“但是，可是，而，却”。He is in poor health, but he still keeps working. ②用在表示歉意的话后，引出一个分句，这个“but”通常不译成汉语。Excuse me, but can you tell me how to get to the railway station? ③

不与although/though (“虽然，尽管”)连用。

Although/Though he is old, he works hard.  

He is old, but he works hard. ④

作介词，表示“除了...之外”。

She did nothing but watch TV.  7连词becausebecause是连词，意为“因为”，可以用来引导原因状语从句。because和so不能同时连用。Becausehegotuplate,hedidnotcatchthefirstbus.=Hegotuplate,sohedidnotcatchthefirstbus.Becausethebookisveryinteresting,wealllikeit.=Thebookisveryinteresting,sowealllikeit.8连词or①“和”，否定句中代替and。

I don’t like bananas or pears. ②

“一般疑问句+or+被选择的部分”构成选择疑问句。

Do you like apples or pears? 

Would you like tea or coffee? ③“祈使句+or+陈述句”，表示 “...，否则，...”。

Hurry up, or you will be late. 

Work hard, or you cannot pass this exam. 9④or

so

“大约，左右” 

I’ll be there in an hour or so.⑤or常用“either…or…”

结构：“要么...要么...；或者...或者”

连接并列主语时，谓语动词的人称要与最后那个主语保持一致。Either you or he is right.10连词or连词soso表示因果关系，连接表示因果的句子。在一个句子中不能同时出现because和so。

These buildings were over 50 years old, so they were not strong enough.

11Completethepassagewithand,but,orbecause.I

loveThursdayafternoons

wehaveafunclassthen.

It’sbiologyclass,

it’s

exciting!

MissBakeristheteacher,

sheworkshardto

maketheclassinteresting.

I’mnotgoodatscience,

I

liketheclassvery

much.

Welearnaboutdifferentplants

animals.

Sometimesit’s

difficulttorememberalltheinformation,

MissBakerhelpsme.

She’smyfavouriteteacher

shemakeseveryoneintheclassfeelspecial.3cbecauseandandbutandbutbecause12Doasurveyinclassusingthequestionsbelow.3dQuestionsClassmate1Classmate2Whichisyourfavouriteschoolday?Whatsubjectsdoyouhavethatday?Whatsubjectsonthatdaydoyoulikeandwhy?Wholikesthesamesubjectsasyouandwhy?13QuestionsClassmate1Classmate2Whichisyourfavouriteschoolday?MyfavoriteschooldayisWednesday.

MyfavoriteschooldayisFriday.Whatsubjectsdoyouhavethatday?Onthatday,IhaveChinese,English,maths,biologyandPEclasses.Onthatday,Ihavemaths,geography,history,scienceandmusicclasses.Whatsubjectsonthatdaydoyoulikeandwhy?IlikemathsandPEclassesbecauseit’schallengingtoworkoutmathsproblemsandfuntoplaysportswithclassmates.Ienjoyhistorybecauseittellsstoriesaboutthepastthathelpmeunderstandwhat’shappeningnow,andsciencefascinatesmewithitsexplorationofthenaturalworld.Wholikesthesamesubjectsasyouandwhy?Mybestfriendenjoysthesamesubjectsasme.Wehaveagoodtimetalkingaboutmaths

problemsandplayingsportstogetherinPE.MyclassmateLilysharesmyinterestinthesesubjects.Sheloves

sharingfunhistoryfacts

withmeandsolvingscientificmysteriesjustlikeme.14Doasurveyinclassusingthequestionsbelow.3dMakeareportaboutwhatsubjectsyourclassmateslikeandwhy.StudentSubjectPreferenceReportJohn’sfavoritedayatschoolisWednesday.HereallyenjoysitbecausehegetstotakehismathsandPEclasses.Johnlovesmaths

becauseit’schallengingandfuntosolvetrickyproblems.PEisalsogreatforhimbecausehegetstoplaysportsandstayactive,whichhethinksisimportantforbeinghealthy.Hisbestfriendalsolikesmaths

andPE.Theyhaveagoodtimetalkingaboutmaths

and

playingsportstogetherinPE.Emily’sfavoriteschooldayisFriday.Shecan’twaitforherhistory

andscienceclassesonthisday.Emilyreallylikeshistory

becauseittellsstoriesaboutthepastthathelpherunderstandwhat’shappeningnow.Sciencegrabsherattentiontoo,because

itfascinatesherwithitsexplorationofthenaturalworld.HerbestfriendLily

alsoloveshistoryandscience.

Theyworkonscienceprojectstogetherandsharefunhistoryfacts.Myclassmateshavedifferentfavoritedaysandclassesbasedonwhattheylikeandwhotheycanbefriendswithoversharedinterests.Thisshowsthathavinglotsofdifferentclassesforeveryonetoenjoyisimportant,and

ithelpsuslearnbetterwhenwe

worktogether.15Conjunctions并列连词（coordinatingconjunctions）从属连词(subordinatingconjunctions)16

并列

连词表并列表转折表选择/否则表原因andboth…andneither…nornotonly…butalsoaswellasbutwhileoreither…orforso

并列连词17

从属连词时间状语从句目的状语从句原因状语从句条件状语从句让步状语从句结果状语从句比较状语从句when,assoonas,while,after,until,since...because,as...if,unless...although/though…so…that...sothat/inorderthat…(not)as…as/notso…as

状语从句

名词性从句if/whetherwh-that18CompletethepassageMickeyMouseandDonaldDuck

Peopleusuallydonotlikemice,_____onemousehaswontheheartsofthepeopleallovertheworld.ThatisthefamousMickeyMouse.Alongtimeagomostfilmsweresilent.AmannamedWalt