Unit1FoodforthoughtUsinglanguageGrammar情态动词课件高中英语

B2U1GrammarActivity1,p6:TranslatethesentencesActivity1,p6:Matchthewordsinboldandthemeanings1beafraidtodosomething2notbenecessarytodosomething3giveadvicetodoornottodosomething4benecessaryorgivestrongadvicetodosomething5havetheabilitytodosomethingdarenotneedn’thadbetterhavetowasabletoHowmanymodalverbsdoyouknow?can(could),may(might),will(would),shall(should),must,need,hadbetter,oughtto,usedto,beableto...1.情态动词有一定的词义,不能独立作谓语，必须和动词原形一起构成谓语*Youcanbuythesebooksforthecourse.2.情态动词一般无人称和数的变化,个别有时态变化。*TheyspokesofastthatIcouldn’thearwhattheyweresaying.3.构成否定句时,not放在其后面。*Theyoungmancan’tcarrythebigstone.*Daddarenottrysomedisheseveraftermanyyearsofmarriage.情态动词Modals情态动词01beableto1.beableto+动词原形，表示“某人做某事的能力”Withherparents’help,Maryisabletoliveanormalteenagelife.在父母的帮助下，玛丽过上了正常的青少年生活。2.was/wereableto还可以表示“某人过去成功地做了某事”Theywereabletoescapefromthebuildingwhenthefirebrokeout.火灾发生时，他们成功地逃出大楼。情态动词02dare1.dare作情态动词，译为“敢”，用于否定句和疑问句，后接动词原形.否定形式为darenot或daren’tHowdareyousayI’munfair?Hedarenotsaywhatshethinks.2.dare作实义动词，有人称、时态和数的变化.肯定句后接todosth；否定句和疑问句后接(to)dosthHedarestochallengeallthedifficulties.Hedoesn’tdare(to)gotherealone.情态动词03need1.need作情态动词，译为“需要”，用于否定句和疑问句，后接动词原形。否定形式为needn’tNeedImakeanappointmentwithDoctorWang?Youneedn’tcleanthetableforus.2.need作实义动词，有人称、时态和数的变化.Ineedtocallhimrightnow.Thedogneedstobefed.情态动词04haveto1.haveto译为“不得不”，有时态和人称变化。否定式为don’t/doesn;t/didn’thavetoHehastopassthisimportantexam.Youdon’thavetogivemethebook.2.区分：haveto强调客观需要，must强调说话者的主观意愿。Wehavetofinishtheworkbeforelunch.（强调客观情况迫使，如果不完成就会…是不得已为之）Wemustfinishtheworkbeforelunch.（强调说话人希望不要拖延尽早完成）情态动词05hadbetterhadbetter译为“应该，最好”，没有人称和时态变化，常写作“sb’dbetter”,否定式为hadbetternotYou’dbetterkeepthiscardathand.Shehadbetternottellliesanymore.CompletethetipsforgoodtablemannerswiththecorrectformofthemodalsinActivity1.WhilegoingonyourfirsttriptotheUKisexciting,newanddifferentcustomscanalsobeconfusing.Tablemannersarenoexception.Butdon’tworry—herearesometips:•You1._________waituntileveryoneelsehasbeenservedbeforeyoustarteating.•Sometimestherearesomanyknivesandforksthatyou2.__________pickthemupincaseyougetitwrong.Thetrickistostartwiththeonesontheoutside.•Whenyoufinishyourmeal,you3.____________placetheknifeandforktogetheronyourplatewiththehandlesatthefouro’clockposition.Tablemanners,however,candifferindifferentsituations.Forexample,you4.____________________useaknifeandforkwheneatingahamburgerorpizza.Justremember:wheninRome,do