grammar:modalverbCan

you

can

a

can

asacanner

can

can

a

can?基本特征基本特征：1.

情態(tài)動詞后跟

。2.情態(tài)動詞無

。動詞原形人稱和數(shù)的變化定義情態(tài)動詞是表示說話人的語氣，態(tài)度或看法的動詞。Can

you

can

a

can

asacanner

can

can

a

can?①

can情態(tài)動詞modal

verb.表示能、會②

can及物動詞vt.把……裝罐③

can名詞n.（食物）罐頭④

canner名詞n.罐頭制造商你能像一個裝罐工人那樣裝一個罐頭嗎？SpongeBobissokindthathecanlookafterPatrickwell.海綿寶寶非常善良，他能很好地照顧派大星。情態(tài)動詞表能力情態(tài)動詞表能力(1)can(否定式為can’t)表示能力，“能；會”。e.g.Icanplaytheguitar.(2)could（否定式為couldn’t）can的過去式，表示過去的能力。e.g.

Lucycouldswimatfiveyearsold.—DoyouknowthesongComeon,

Haixi!—Yes,andI_________singitwell.A.must B.can C.needBIcanmakedelicioushamburgers.MayIeatone?情態(tài)動詞表請求情態(tài)動詞表請求①can/could/may/might委婉程度:can<may<could<might

情態(tài)動詞表請求情態(tài)動詞例句例句can

—Mum,it’stoohot.Can/Could/MayIswiminthelakewithmyfriends?—Yes,youcan./Sorry,youcan’t.—Can/Couldyoulendmefivepounds?—Yes,Ican./Sorry,Ican’t.肯定回答:couldmay否定回答:mightYes,sb.can.No,sb.can’t.No,sb.mustn’t.②肯否回答—Mum,it'stoohot.________Iswiminthelake?—No,you________.That'stoodangerous!A.

Should;can‘t B.

Need;mustn’tC.

Must;needn‘t D.

Could;mustn't當表示_____________時，必須用______________危險情形mustn’tD情態(tài)動詞表義務must

表示義務、命令或必要，意為“必須”，強調主觀看法。mustn’t

表示“不允許；禁止”之意。must主觀意愿haveto客觀條件情態(tài)動詞表義務

must

vs

haveto同

都表示:異must沒有;haveto可用于例:Shehadtodressasan11-year-oldyounggirlinyesterday’sparty.Youwillhavetostudyincollegeforyearsifyouwanttobeadoctor.義務，必須，不得不時態(tài)變化多種時態(tài)—Howdoyouusuallygotoschool?—Myschoolisfaraway.I

takethebustoschool.A.must B.might C.havetoCMust引導的一般疑問句我必須……？—MustIfinishmyhomeworknow?—Yes,you________.—No,you________.needn’tmustNo,youmustn’t.禁止表必須，肯用媽(must)答，不肯你(need)答。You

shouldnot

eatsomanyhamburgers.情態(tài)動詞表建議情態(tài)動詞用法例句should否定形式（shouldn’t）Theyshouldenjoythemselveswhentheyarefree.hadbetterIt’sgoingtorain.Youhadbettertakeanumbrella.應該最好hadbetterdo(原形)sth.

意為”最好做某事”，其否定式是在better后加not。Youlooktootired.You________restand________worktoomuch.A.should;should B.shouldn’t;shouldn’tC.shouldn’t;should D.should;shouldn’t1.—_______yougivemeahand?Ican'tmovetheboxbymyself.—Noproblem.A.Could B.Should C.Must D.Need2.—Mustwedoourhomeworkfirst? —No,you_______.Youmayhavearestfirst. A.mustn’t B.needn’t C.maynot D.can’tAB3.Thechildren_______playfootballontheroad.A.can’t B.can C.mustn’t D.must4.—Lily,_______

youfinishtheletterintenminutes? —Yes,Ican.A.must

B.should

C.need

D.canCD5.I_______

gonow,orI'llmissmytrain.A.can

B.might C.must

D.couldC情態(tài)動詞情態(tài)動詞表推測他可能很帥！他一定不帥！他肯定很帥！情態(tài)動詞表推測他可能長得很帥！他肯定很帥！他一定不帥！Hemaybehandsome.Hemustbehandsome.Hecan’tbehandsome.表示推測情態(tài)動詞表推測It’ssaidthatIwillwinthelottery(中彩票).A:Canitbetrue?B:Itcan’tbetrue.D:Itmay(might)betrue.C:Itmay(might)notbetrue.E:Itmustbetrue.絕對否定絕對肯定不確定小結:can’t可能性為0%，意為“不可能”。may

/

might

意為“可能”。must可能性為100%，意為“一定”。情態(tài)動詞表推測情態(tài)動詞意思推測程度must一定、肯定用于非常確定的推測，用于肯定句。may/might/could有可能，也許不確定的推測。can/can’t可能/不可能通常在疑問句和否定句中表推測；但can在表示理論上的可能性以及后面接“系動詞+形容詞”時可用于肯定句。例如：Swimmingcanbealotoffun.游泳有時會非常有意思?？赡苄裕簃ust＞may＞could＞might＞can’tJohn________cometoseeustonight,butheisn'tverysureyet.A.mayB.canC.hastoD.must鞏固練習1.—Whoseisthedictionary?—It______beAlice’s.Lookathernameonthecover.A.can B.must C.may D.can’t2.—Lookattheyoungladyinred.IsitMrs.King? —No.It_____beher.Sheiswearingawhitedresstoday.A.can B.may C.must D.can’tBD3.—Wow....anothergift!What’sinthebox? —I’mnotsure.It________beapairofsportsshoes.A.

mustB.

mayC.

willD.

can4.—Bob,WhereisLinda