初中英语现在完成时课件.ppt
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1、现在完成时现在完成时ThePresentPerfectTense 现在完成时的基本结构现在完成时的基本结构have/has+动词过去分去分词 (hashas用于第三人称单数)用于第三人称单数)过去分词的变化:过去分词的变化: (1)规则变化规则变化构成规则构成规则原原 形形过过 去去 式式过去分词过去分词 一般在动词原形末尾 加-ed-ed work play worked played worked played 结尾是e的动词加-d-d hope live hoped lived hoped lived 末尾只有一个辅音字 母的重读闭音节词,先 双写这个辅音字母,再 加-ed-ed sto
2、p trip stopped tripped stopped tripped 结尾是“辅音字母+y”的动词,先变“y y”为“ i i”再加-ed-ed study worry studiedworried studiedworried不规则动词的过去式以及过去分词巧记规律AAA: put put put letlet letABA: becomebecamebecomeABB: standstoodstoodABC: eat ateeatenAAAcost-cost-costread-read-readput-put-putcut-cut-cutlet-let-letset-set-seth
3、it-hit-hithurt-hurt-hurt原形、过去式和过去分词的词形和读音都相同的单词,结尾字母一般是t或d。特殊:特殊:动词read的过去式和过去分词虽然词形与原形一致,read-read-read,但发音分别是ri:d-red-red。 有些动词的过去分词与原形是一样的:run-ran-runcome-came-comebecome-became-becomeovercome-overcame-overcomeABA原型原型过去式过去式过去分词过去分词例词例词-eep-ept-eptkeep,sweep,sleep-ell-old-oldsell,tell-d-t-tlend,sp
4、end,send,build-ay-aid-aidsay,pay,lay-n-nt-ntburn,learn,mean-ee-e-e-meet,feed-ought-oughtbring,buy,fight,think-aught-aughtcatch,teachABB(含规则动词含规则动词)1.另有一些其它形式的变化。have(has)-had-hadleave-left-leftlose-lost-lostmake-made-madefeel-felt-feltspell-spelt-speltstand-stood-stood2.改变单词中间元音字母。sit-sat-sat(babysi
5、t)win-won-wonshine-shone-shonehold-held-heldfind-found-foundhear-heard-heardhang-hung(hanged)-hung(hanged)ABB(含规则动词含规则动词)ABC原型原型过去式过去式过去分过去分词词例词例词-eak-oke-okenbreak,speak-eal-ole-olensteal-ear-ore-ornwear,bear,tear-ow(aw)-ew-owngrow,blow,know,throw,draw-i-a-u-sink,swim,drink,ring,sing,begin-i-o-ndri
6、ve,rise,ride,writeABC有些动词的过去分词是在原形词尾加n或en,变成以en结尾的单词。take-took-takengive-gave-givenfall-fell-falleneat-ate-eatenwrite-wrote-writtenspeak-spoke-spokenfreeze-froze-frozenride-rode-riddenget-got-gotten(got)forget-forgot-forgotten(forgot)特殊:am/is-was-beenare-were-been,do(does)-did-donego-went-gonesee-sa
7、w-seenshow-showed-shown(showed)lie-lay(lied)-lain(lied)I.写出下列动词的过去分词形式写出下列动词的过去分词形式.1.wake_2.teach_3.sell_4.see_5.ride_6.pay_7.choose_8.throw_9.think_10.eat_11.drive_12.catch_13.bring_14.break_15.give_16.get_17.know_18.open_19.write_20.forget_woken taughtsold seenridden paid chosen thrownthought eat
8、en driven caught brought brokengiven gotgotten known openedwritten forgotten第一人称第一人称第二人称第二人称第三人称第三人称肯定句肯定句( (主语主语 + + 助动词助动词have/has + 动词的词的过去分词。过去分词。) )Ihavewrittenanarticle.Wehavewrittenanarticle.Youhavewrittenanarticle.Youhavewrittenanarticle.He/She/Ithaswrittenanarticle.Theyhavewrittenanarticle.
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