Unit8第2课时语法精讲-八年级英语下册课堂（人教版）（含音频）

第二课时

语法篇：现在完成时PPT部分图片来源于网络。Unit8 HaveyoureadTreasureIslandyet？现在完成时：定义和肯定句现在完成时：一般疑问句目标现在完成时：时间标志词现在完成时：动词过去分词的规则变化现在完成时：四大句式常用的动词的过去分词GrammarGrammarOne现在完成时：定义和肯定句【观察】结构：注意：1.have后跟一个动词的过去分词；

2.主语是三单用has，再跟动词过去分词；3.have可以缩写为’ve。1.从定义上简单来讲，事情要做一段时间，还没有做完，持续到现在；2.过去分词有规则和不规则之分，加ed是规则变化，没有ed是不规则变化。【原句】I’vealreadyfinishedreadingit.【例句】1.Wehavekeptthesebooksfortwodays.2.They’vejustseenthisfilmfor10minutes.3.ShehaswatchedTVforhalfanhour.定义：从过去某个时间持续到现在。肯定句：主语

+have+动词过去分词+for+其他。1个1分。【写出下列原形】1.eaten-_______2.kept-_______3.seen-________4.watched-________eatkeepseewatch现在完成时：一般疑问句GrammarTwoHaveyoureadTreasureIslandyet？Hassheevermovedhouse?助动词Have/Has+主语+动词过去分词done+宾语Have/has+主语+done...?Yes,主+have/has.谓宾主Hasthetownchangedalotovertheyears?多年来小镇发生很大的改变吗？Haveyoueatenthewatermelon?Yes,Ihave.No,Ihaven’t.sheHasshehas.shehasn’t.No,主+haven’t/hasn’t.012345678910判断句子对错。现在完成时表示过去持续到现在的动作。RoundOneGrammar012345678910Grammar判断句子对错。现在完成时一般疑问句只需要把have/has和主语交换位置

。GrammarThree现在完成时：时间标志词Hasthetownchangedalotovertheyears?We'velivedinthisareasincethen.l'velivedheresinceIwasborn.l'vejust

eatenit.Haveyouevermovedhouse?just,

ever,since,sincethen,overtheyears,before,yet,recently

（一般疑问句）（否定句）justnow用于一般过去时现在完成时：动词过去分词规则变化GrammarFour大部分动词+edfinished以e结尾的动词+dchange以y结尾的动词把y改为i+edcarry以重读闭音节结尾的动词双写最后一个字母+edstopd不规则变化AAA型hit-hit-hitAAB型beat-beat-beatenABA型come-came-comeABB型spend-spent-spentABC型do-did-doneiedped012345678910判断句子对错。justnow和just都用于现在完成时。RoundTwoGrammar012345678910判断句子对错。不规则变化中有的动词过去式和过去分词与原形一样。GrammarGrammarFive现在完成时：四大句式Ihavearrived.Ihavenotarrived.肯定句：主语+have/hasdone+...Yes,you+have/has.HaveIarrived?No,you+haven’t/hasn’t.否定句：主语+haven’t/hasn’tdone+...一般疑问句：Have/Has+主语+done+...？Yes,主+have/has.No,主+haven’t/hasn’t.havenot=haven’thasnot=hasn’tWhathaveyoudone?特殊疑问句：Whathave/has+主语+done+...?GrammarOne常用的动词的过去分词do-did-donego-went-gonecome-came-comebuy-bought-boughtfeel-felt-feltfind-found-foundtake-took-takengive-gave-givenhave-had-hadhear-heard-heardkeep-kept-keptmake-made-madesay-said-saidtell-told-told012345678910判断句子对错。come的过去分词是comed。RoundThreeGrammar012345678910判断句子对错。havenot可以缩写为haven’t。GrammarSummary现在完成时：四大句式常用的动词的过去分词Finished！GoodJob！Summary现在完成时：定义和肯定句现在完成时：一般疑问句目标现在完成时：时间标志词现在完成时：动词过去分词的规则变化PracticesPractices暴走模式两两PK，看谁反应快。1题1分。012345678910A.worksB.hasworkedC.willworkD.isworkingZhangGuimei_______inless-developedareasforover40years.单项选择。RoundFourPractice012345678910A.werefinishingB.arefinishedC.havefinishedD.finish—MissBrown,we_______cleaningourclassroom.Canwegohomenow?—Yes.Goahead.Practice单项选择。012345678910B.Did:finishA.Have;finishedC.Will;finishD.Do;finishPractice单项选择。—_______you_______writingthee-mailyet?—No,Ihaven't.ButIwilldoitlater.—Lily,whyareyoustillhere?Schoolhasbeenoverforhalfanhour.—BecauseI________mytaskyet.Istillneedonemorehour.012345678910A.haven'tfinishedB.didn'tfinishC.won'tfinishD.don'tfinishPractice单项选择。1.ZhangGuimei_______inless-developedareasforover40years.A.works B.hasworked C.willwork D.isworking2.—MissBrown,we_______cleaningourclassroom.Canwegohomenow?—Yes.Goahead.A.werefinishingB.arefinished C.havefinishedD.finish3.—_______you_______writingthee-mailyet?—No,Ihaven't.ButIwilldoitlater.A.Have;finishedB.Did:finish C.Will;finish D.Do;finish4.—Lily,whyareyoustillhere?Schoolhasbeenoverforhalfanhour.—B