新概念英语第二册情态动词课件(共41张ppt).pptxVIP

情态助动词值得注意的两个语法特征;两类情态意义;can/could：“能力”、“许可”

may/might：“许可”

will/would/shall：“意愿”、“意图”

should/oughtto/must：“义务”;表示“能力”：can，could，beableto;表示“可能”：may，might，can，could;e.g.Idon’tknowwheretheletteris.Imay/mighthavethrown

itaway.

Theflightcouldhavebeendelayed.

Shecan’t/couldhavemissedthetrain.;;;e.g.IcanstayupaslateasIlike.Myparentsdon’tmind.

（也可用amallowedto，通常不用may）

YearsagovisitorstoStonehengecould/wereallowedto

gorightuptothestones.

（过去的一般许可）

Thefivestudentswereallowedtogorightuptothestones.

（过去特定的许可）;表示“不许”;表示“义务”：should，oughtto，must;该结构大多用于表述过去的“非真实”情况，常含有责备的语气。;;;;;表示“推测”：（should，oughtto，must）will，would;（2）对某些习惯性事态的推测：will（现在习惯），would（过去习惯）

e.g.Shewilllistentorecords,aloneinherroom,forhours.

Shewouldspendhoursinthebathroomoronthetelephone.

?

（3）对某些不受时限的客观过程的推测：will（相当于一般现在时）

e.g.Oilwillfloatonwater.=Oilfloatsonwater.;表示“意愿”：will，would，shall;e.g.Iaskedhimifhewouldhelpmewithmywriting.

（间接引语中）

WhenIwasatcollege,Iwouldn’treadanybookssolely

forpleasure.

（过去时间语境中）;表示“意图”：will，would，shall;e.g.ShallIcarrythesuitcaseforyou?=Doyouwantmeto

carryyoursuitcase?;表示“决心”：will,would,shall（重读，不缩写）;e.g.Youshallobeymyorders.=Iinsistthatyouobeymyorders.

Foreigncountriesshallnotinterfereinourinternalaffairs.

=Wearedeterminednottoallowanyforeigncountryto

interfereinourinternalaffairs.;WhichofthefollowingitalicizedwordsdoesNOTindicatewillingness?

A.

B.

C.

D.;WhichofthefollowingsentencesindicatesPOSSIBILITY?

A.

B.

C.

D.;Which?of?the?following?sentences?expresses?a?fact??

A.

B.

C.

D.;Whichofthefollowin