《IT职业英语》课件unit9 Modal verbs情态动词

一、情态动词的定义情态动词用来表达说话者对主要行为动作的态度的。如：能力、责任或义务、建议、许可、可能性等。二、情态动词的形式尽管情态动词有现在和过去两种形式，但是情态动词没有时态的区分。情态动词的现在形式指现在和将来；情态动词的过去形式指过去、现在和将来。情态动词的完成形式也存在，也指过去、现在和将来。注意：一般疑问句形式是情态动词提到主语前面（倒转）。三、情态动词的用法和例句能力:can,could,beabletoIcanuseC++.Iamabletouseacomputer.IcoulduseC++whenIwasten.责任或义务:(rulesandlaws)must/haveto,mustn’t,can’t,should,shouldn’t,couldn’t(personalauthority)must/haveto,mustn’t,can’t,will,won’t,shall,shan’t责任或义务的否定形式:(rulesandlaws)needn’t/don’thaveto,can,may(personalauthority)must/haveto,mustn’t,should,shouldn’t建议:must(strongest),should(strong),oughtto(lessformal),could(forgeneraladvice),

许可:may,can,might,could

(might:veryformal;may:formal&polite;could:lessformalbutpolite;can:informal&lesspolite)可能性:will,must,should,may,might,could,can(will:mostcertain;might/could:leastcertain)ExerciseFillinthegapswithanappropriatemodalverb:1. Sandy__________drivebutshedoesn’thaveacar.2. Iusedto__________standonmyhandsbutIcan’tdoitnow.3. Mygrandmotherwasanintelligentwoman.She__________speak6languages.4. Passengers__________gothroughthesecuritycheckattheairport.5. You___________smokeinthenon-smokingarea.6. IcanstayinbedlatebecauseI__________worktomorrow.7. Itislate.I__________gonow.8. Drivingamotorbikewithoutwearingahelmetisdangerous.He__________wearahelmet.9. Sheisfeelingsick.Sheatetoomuch.She__________haveeatensomuch.10. __________Iuseyourcomputer?Mineisnotworking.11. Claire__________getboredinherjob.Shedoesthesamethingeveryday.12. Thebossshouldbeh