Unit 2 Sporting events Grammar and usage 课件

《Unit 2 Sporting events Grammar and usage 课件》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、Unit2SportingeventsGrammarandusage课件情态动词没有人称和数的变化，有词义，但是不完整，不能单独做谓语，必须和不带to的动词不定式连用。abilitycertaintypermissionobligationmakerequestsmakesuggestionsmakeoffersgiveadvice能力义务,责任确定允许提出请求提出建议提供帮忙提出忠告Modalverbs:generalintroduction(1)Hecanrunthe100msprintin11seconds.(2)____thislittlegirl

2、readbeforeshegoestotheprimaryschool?abilitycan表示可能性时，指的是理论上的可能，它通常不用来表示某事实际发生的可能性或真实性。如：Accidentscanhappen.Anybodycanmakemistakes．can/beabletoCancan/beabletoability在过去时态的肯定句中需要某种条件或努力做成某事，我们要用was／wereableto而不能用could。如：Itwasaholidayandthechildrenwereabletogototheseaside．Thegirlwork

3、edhardsoshe__________passthefinaltest．I’msorryIhaven’tbeenabletoplaytenniswithyourecently.wasabletoobligationoughtto/shouldoughtto与should意思接近，大多数情况下二者可以互换，但是should谈的是自己的主观看法,用于各种人称。oughtto则更多反映客观情况，在谈到法律、义务和规定时使用。如：Weshould／oughttohelpeachotherandlearnfromeachotherinourwork．You___

4、______(不应该）spendsomuchtimeplaying.Sheisyourmother,soyououghttosupporther．Oughthetogo?Yes,Ithinkhe___________shouldn’tought(to)haveto/mustobligationmust与haveto都可以表示“必须”的意思，但要注意以下两点区别。1)must只有现在时，而haveto有现在时、过去时和将来时。如：Wemustworkhard,orwe’llfailintheexamination．Twoyearsago,thepoorgir

5、l______leaveschoolforlackofmoney．hadto2)must表示主观看法，haveto则侧重于客观需要。如：Wemustbestrictwithourselvesineverything．Incitieswithmanycars,somepeoplehavetowearmasks．obligationhaveto/mustShemightwinamedalattheOlympics.Shemaybeathomenow.Shecouldreadandwriteattheageof4.Sheshouldcometojoinus.Sh

6、eoughtto/will/musthelpmewheneverIamintrouble.certaintymight/may/could/should/oughtto/will/mustveryuncertaintyalmostcertaintycan/could/may/mightcould比can更委婉，might比may更委婉—CanIwatchtheOlympics?—Yes,youcan.No,youcan’t.—MayIwatchTVafterfinishingmyhomework?—Yes,youmay./No,youmustn’t./No

7、,youmaynot./No,you’dbetternot.permissioninformal/spokenformal/written—Will/Can/Could/Wouldyouhelpmewithmytraining?—Yes,Iwill/can/can/will.will/can/could/wouldmakerequestsinformalformalmakesuggestionsshall常用于第一，三人称，表示征求对方意见。—Shallwe/I/he/she/theydosomeexercisethismorning?—Yes.—Shal

8、lhecomein?—Ok.makeoffersI’llwashy