英语情态动词.ppt

,Modalverbs,情态动词,表示肯定推测,表示否定推测,cancouldmaymightmust,cantcouldntmaynotmigntnot,情态动词推测,1.肯定推测(5个)：must（一定）cancouldmaymight（可能）,情态动词推测,1.肯定推测(5个)：must（一定）cancouldmaymight（可能）eg:Look,shewearsaschooluniform,shemustbeastudent.,情态动词推测,1.肯定推测(5个)：must（一定）cancouldmaymight（可能）eg:Look,shewearsaschooluniform,shemustbeastudent.eg:Look,shedoesntwearaschooluniform,shemustntbeastudent.,情态动词推测,1.肯定推测(5个)：must（一定）cancouldmaymight（可能）eg:Look,shewearsaschooluniform,shemustbeastudent.eg:Look,shedoesntwearaschooluniform,shemustntbeastudent.must+notmustnt一定不,情态动词推测,1.肯定推测(5个)：must（一定）cancouldmaymight（可能）eg:Look,shewearsaschooluniform,shemustbeastudent.eg:Look,shedoesntwearaschooluniform,shemustntbeastudent.must+notmustnt一定不,情态动词推测,1.肯定推测(5个)：must（一定）cancouldmaymight（可能）eg:Look,shewearsaschooluniform,shemustbeastudent.eg:Look,shedoesntwearaschooluniform,shemustntbeastudent.must+notmustnt一定不禁止,2.表示否定推测的情态动词：,cant/couldnt一定不，不可能maynot/migntnot可能不,2.表示否定推测的情态动词：,cant/couldnt一定不，不可能maynot/migntnot可能不eg:Look,shedoesntwearaschooluniform,shecantbeastudent.,不同的“肯定”程度可按下列层次排列：Heisathome.(事实)Hemustbeathome.（非常肯定的推断）Hecouldbeathome.（很可能）Hemaybeathome.（仅仅可能而已）Hemightbeathome.（或许,非常不确定）Hemightnotbeathome.（也许不在家）Hemaynotbeathome.（比might可能）Hecouldntbeathome.（很可能不在家）Hecantbeathome.（一定不在家）Heisntathome.（事实）,1.WhoseT-shirtisthis?It_beJohns.Its_smallforhim.A.cant;muchtooB.cant;toomuchC.mustnt;muchtooD.mustnt;toomuch【解析】情态动词的用法。根据句意“它不可能是约翰的，对他来说太小了。”故排除C、D，toomuch为“太多”的意思，muchtoo为“太”。故选A。,A,2.Whereareyougoingthismonth?We_gotoXiamen,butwerenotsure.A.needntB.mustC.mightD.mustnt【解析】neednt(不必)表建议；must(一定)表猜测的可能性很大；might(可能，也许)表不是很肯定的猜测。mustnt(不允许)表命令。句意：-这个月你们将去哪？-我们或许去厦门，但还不确定。,C,3.Whossinginginthegarden?It_beMr.Brown.Healwayspracticessingingatthistime.A.mustB.can