教学教材：外研版高中英语新教材必修一;Modals（1）

Lookatthesentencesfromthereadingpassage.Thinkandwork

outthemeaningsofthewordsinbold.

1Whatisthedifferencebetweensentences(a)and(b)?

;Matchthemeaningstothewordsinbold.;Whataremodals?;1.beableto;beabletoV.S.can;【用法辨析】can与beableto

（1）can与beableto都表示能力,在许多情况下可以交替使用。但can只有现在式和过去式（could）,而beableto则有更多的形式。

（2）can一般指自身具有的能力,而如果要表达将来的能力,一般要用willbeableto。

（3）beableto的过去式was/wereableto在肯定句中可表示过去设法做成了某事,相当于managedtodo/succeededindoingsth,而could则无此意义。;◆选词填空（beableto/can）

（1）Thepolicearedoingalltheytofindher.

（2）YoumustspeakFrenchforthisjob.

（3）ThistimeIfailedtheexam,butI’llpasstheexamnexttime.

（4）Thefirewasverybig,butmostpeopleescapefromit.

（5）IgiveyoudetailsbecauseIdon’tactuallyhaveanydetails.

（6）Hecomeagaintomorrowbecauseheisbusy.

（7）Whenhewasyoung,heswimveryfast.

（8）I’msorryIansweryourletterintime.

（9）HesaidthatTomgetthereontimebecausehegotuplate.;Benny,thePolishscientist,hasspenthislifetimestudyingactivevolcanoesanddeepcavesinallpartsoftheworld.In1948,hewenttoalakeintheCongotoobserveanewvolcanowhichhelaternamedKituro.Benny1______________setuphiscampveryclosetothevolcanowhileitwaseruptingviolently.Thoughhemanagedtotakeanumberofbrilliantphotographs,he2__________________staynearthevolcanoforverylong.Henoticedthatariverofliquidrockwascomingtowardshim.Itthreatenedtosurroundhimcompletely,butBennymanagedtoescapejustintime.Hewaiteduntilthevolcanobecamequietandhe3_______________returntwodayslater.Thistime,hemanagedtoclimbintothemouthofKiturosothathe4______________takephotographsandmeasuretemperatures.Bennyhasoftenriskedhislifeinthis