资源描述:
《lesson5-语法-情态动词.doc》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、2012年秋季初二英语目标班第5讲—Grammar(情态动词)温故:一.基本用法1.can含义1:能够(=beableto)否定:can’t过去式:couldIcanswim.IcoulddothiswhenIwasyoung.Iwillnotbeabletogoswimmingtomorrow.含义2:可以(请求)could更委婉CanIgonow=MayIgonow?Yes,youcan/No,youcan’t2.may含义:可以(请求)否定:can’t/mustn’t过去式:might--
2、May/MightIsmokehere?--No,youcan’t/mustn’t.3.must含义:必须否定:needn’t(没必要)mustn’t(不准,禁止)Wemustobeytheschoolrules.Youmustn’tspithere.Youneedn’ttakeanumbrellahere.IhadtoworkwhenIwasyoung.must:主观haveto:客观(hadto)4.need(需要)&dare(敢)1.作情态动词:(1)needn’tdosth(2)无三单(
3、3)用于否/疑中Youneedn’tcomesoearly.NeedIfinishtheworktoday?--Dareyoucatchthemouse?--Idarenotdothat.2:作实意动词肯定:need/daretodo否定:do/does/did+not+dare/needtodoWeneedtoprotecttheanimals.Sheneedstocleanherroom.Shedoesn’tdaretomeethiseyes.5.shall否定:shan’t过去式:shou
4、ld1.第一人称后:将要2.shallI/wedosth:建议3.第二,三人称:许诺,命令,警告,威胁等。Ishall/willgotoShanghainextweek.Shallwegotothetheatre?Whatshallwedo?Youshallfailifyoudon’tworkhard.6.should含义:应该否定:shouldn’toughtto和should可互换should—主观看法oughtto—客观情况法律和义务规定—oughttoWeshould/oughttohe
5、lpeachotherandlearnfromeachotherinourwork.Sheisyourmother,soyououghttosupporther.7.will&wouldwill:助动词--将情态动词—一定会(意志,愿望和决心)Shewillvisitustomorrow.Iwillneverdothatagain.would---表建议句型Wouldyouliketodosth?Wouldyouminddoingsth?Wouldyouplease(not)dosth?8.ha
6、dbetter(最好)否定:hadbetter(not)dosthYouhadbetternoteattoomuchchocolate.9.usedto含义:过去常常否定:didn’tuseto/usedn’ttoIusedtogetupearly.Ididn’tusedtoreadbooks.usedtodo:过去常常做beusedtodoingsth:习惯于做beusedtodosth:被用来做二.固定回答问句肯定回答否定回答MayI…?Yes,ofcourse.Yes,certainly.
7、Sure.No,youcan’t.No,youmustn’t.MustI…?Yes,youmust.No,youneedn’t.No,youdon’thaveto.No,youdon’tneedto.NeedI…?Yes,youmust.No,youneedn’t.知新:情态动词表推测一.基本用法有把握的推测肯定:must否定:can’tThelightison,sohemustbeathome.Itissunny,itcan’train.没把握的推测could,may,might--Can/c
8、oulditbeyourteacher?--No,itcan’tbeourteacher.ShehasgonetoAmerica.二.情态动词表推测的三种时态对现在或一般情况的推测情态动词+be情态动词+bedoing情态动词+动原Hemustbelisteningtomusic.Hecan’tbeathomenow.Thelightisn’ton.对过去的推测情态动词+havedoneThegroundiswet.Itmayhaverainedlastnight.三.分合两宜maybe—副词(