英文版现在进行时用法详解.ppt

SimplePresentTense

现在进行时

Howdowemakesimplepresenttense（构成）subject+auxiliaryverb+mainverb??主语+情态动词+主动词do?baseForpositivesentences,wedonotnormallyusetheauxiliary.Forthe3rdpersonsingular(he,she,it),weaddstothemainverborestotheauxiliary.(does)Iftheverbendsin-ss,-sh,-ch,-xor-o,add-estothebaseform:

kiss-kisses,?finish-finishes,?watch-watches,?mix-mixes,go–goes?Iftheverbendsinconsonant+ychangeytoiandadd-es:

??study-studies,?copy-copies,?try-tries,?carry-carriesFortheverbtobe,wedonotuseanauxiliary,evenforquestionsandnegatives.(seetable2)Auxiliaryverbsdo,have,whichcanalsobeusedasmainverbs,todotohave

I/you/we/theydoI/you/we/theyhave

he/she/itdoeshe/she/ithas

SubjectAuxiliaryverbMainverb+I,you,we,theyplayfootball.He,she,itplaysfootball.-I,you,we,theydonotplayfootball.He,she,itdoesnotplayfootball.？DoI,you,we,theyplayfootball?Doeshe,she,itplayfootball?Lookattheseexampleswiththemainverblike:

Lookattheseexampleswiththemainverbbe.Noticethatthereisnoauxiliary:SubjectMainverb+IamChinese.You,we,theyareChinese.He,she,itisChinese.-IamnotChinese.You,we,theyarenotChinese.He,she,itisnotChinese.?AmIlate?Areyou,we,theylate?Ishe,she,itlate?

Whendoweusesimplepresenttense（何时使用）Facts,generalizationsanduniversaltruths（事实，结论，普遍真理）Habitsandroutines（习惯和日常活动）Permanentsituations（不变的情况）Eventsthatarecertaintohappen（一定要发生的事件）Arrangementsthatwecan‘tchange(e.g.timetables,officialmeetings)（不能改变的安排）Stateverbs(e.g.be,have,suppose,know)（静态动词）Narrations,instructionsorcommentaries（叙述，说明或评论解说）

Use1:Facts,GeneralizationsandUniveralTruthsWeusethePresentSimpletotalkaboutuniversaltruths(forexample,lawsofnature)orthingswebelieve