八年级英语unit8现在完成时2--动词过去分词变化

1、现在现在完成完成时时21. A. 用 already或 yet1) Have they taken down the old pictures _ _? No, they havent_ _.2) Most of us have finished our compositions _ .3) He said he hadnt visited the exhibition _ _.yetyetalreadyyetB.用 since或 for1) We have learned five lessons _ _ _ the beginning of this term.2) Mrs Liao ha

2、s been in hospital _ _ _last week.3) I have stayed at my aunts _ _two weeks.sincesincefor3、非延续性动词和延续性动词的转换现在完成时可以和带有since或for等表示“一段时间”的状语连用,表示动作或状态从某一时刻开始，一直持续到现在。如：I havent seen him for two years. 但是，像come, arrive, buy等要用，必须改为要用，必须改为“be（在）（在）”等延续性动词来表述等延续性动词来表述。现归纳总结一下由非延续性动词到延续性动词的转换： arrive be he

3、rebegin(start)be on die be deadcome back be back leave be awayclose be closed fall ill(sick, asleep)be ill(sick, asleep)get up be upgo out be out finish be overput on wear 或be on open be openjoin be in或 be a member ofgo to school be a student borrowkeep buy have catch(a cold)have(a cold) get to know

4、 know begin to study study come to work work等 come/go be on/at动词过去分词变化分为规则变化和不规则变化一、规则变化（同动词一般过去式变化）一、规则变化（同动词一般过去式变化）1一般情况下在原形后加-ed。如：work-worked, help-helped。 2以e结尾的单词，在原形后加-d。如：like-liked, joke-joked, hope-hoped. 3. 以辅音字母+y结尾的单词，变y为i再加-ed。如：study-studied, carry-carried, copy-copied。 4以重读闭音节、末尾只有一

5、个辅音字母结尾的单词，双写末尾的辅音字母再加-ed。如：stop-stopped, prefer-preferred, admit-admitted, plan-planned. 二、不规则变化(1) AAA型型（动词原形、过去式、过去分词同形）（动词原形、过去式、过去分词同形） cost cost（花费）（花费） cost cost cost cost cut cut（割）（割） cut cut cut cut hit hit（打）（打） hit hit hithit hurt hurt 伤害）伤害） hurt hurt hurt hurt let let（让）（让） let let let

6、 let put put（放）（放） put put put put read read （读）（读） read read read read(2) AAB型型（动原与动原与过去式同形）过去式同形） beat（跳动）（跳动） beat beaten (3) ABA型（动词原形与过去分词同形）型（动词原形与过去分词同形） become become（变成）（变成） bec beca ame become me become come come（来）（来） c ca ame comeme come run run（跑）（跑）r ra an n run run (4) ABB型（过去式与过去分词同形

7、型（过去式与过去分词同形）bring (拿来）拿来）-brought broughtbuild(build(修；建）修；建） - - builtbuilt - built- builtburn (burn (烧）烧） - - burnt burnt - burnt burnt buy (buy (买）买） - bought bought - bought boughtcatch( catch( 抓，赶）抓，赶） - caught - caughtcaught - caughtdigdig（挖）（挖） - - dug - dug - dug dugdream(dream(梦想）梦想） -drea

8、mt- dreamt-dreamt- dreamtdrink (drink (喝）喝） - drunk - -drunk- drunk - -drunk feed (feed (喂）喂） -fed - fed-fed - fedfeelfeel（感觉感觉） - - feltfelt - - feltfeltleave(离开）离开）-left leftlenlend d( (借出）借出） - lenlent t - len - lent tsensend d( ( 寄；派）寄；派） sensent t sen sent tlose lose （迷失）（迷失） lost lostlost lost

9、lightlight（点燃点燃） - - lit lit - - lit lit makemake（做；制做；制） - - mademade - made- mademeetmeet（遇见遇见） - - met - met - metmetmean (mean (意思是）意思是）- meant- meant- meant- meants sayay ( (说）说） s saidaid s saidaid lay lay ( (产卵）产卵） l laidaid l laidaidpay (pay (付款）付款） p paidaid p paidaidshine(shine(闪耀）闪耀） shon

10、e shoneshone shonesit ( sit ( 坐下）坐下） s si it sitt sitsleep slept sleptsleep slept sleptfight(打架）打架）-fought foughtfind(find(找到）找到） - found - found - found found getget（得到）（得到） - - got - got - got gothanghang（吊死）（吊死） - - hanged hanged - - hangedhangedhanghang（悬挂）（悬挂） - - hung - hung - hung hunghear (h

11、ear (听到）听到） heard heardheard heardholdhold（抓住）（抓住） held held held held keep( keep( 保持）保持） kept keptkept keptlead lead ( ( 领导）领导） led ledled ledlearn (learn (学习）学习） learnt learnt learnt learnt smell(闻）闻）-smelt smelt spell(spell(找到）找到） - spelt - spet spelt - spet speedspeed（加速加速） - - spedsped - - sped

12、 sped standstand（站立站立） - - stoodstood - stood- stoodstick( stick( 黏贴）黏贴） stuck stuckstuck stuck s sellell（卖卖）ssoldold s soldold t tellell （告诉）（告诉） t toldold t toldoldteachteach（教教） - - taught - taught - taught taughtthink (think (想）想） thought thoughtthought thoughtunderstandunderstand（理解理解）- underst

13、ood - understood- understood - understoodwin (win (赢）赢） - won- won- won- wonhave/has have/has ( (有）有） - had had- had had带带号的词也可视为规则动词号的词也可视为规则动词 ABB型1.在动词原形后加在动词原形后加t t或或d 原形原形过去式过去式过去分词过去分词中文意思中文意思burnburntburnt燃烧learnlearntlearnt学习meanmeantmeant意思是hearheardheard听 ABB ABB型型2. 原形原形aught aught 原形原形过去

14、式过去式过去分词过去分词中文意思中文意思catchcaughtcaught捉,抓teachtaughttaught教 ABB ABB型型3. 原形原形ellold old 原形原形过去式过去式过去分词过去分词中文意思中文意思telltoldtold告诉sellsoldsold卖 ABB ABB型型4. 原形原形ought ought 原形原形过去式过去式过去分词过去分词中文意思中文意思bringbroughtbrought带来buyboughtbought买fightfoughtfought打架thinkthoughtthought思考 ABB ABB型型5. 原形原形ayaid aid 原形

15、原形过去式过去式过去分词过去分词中文意思中文意思paypaidpaid付款laylaidlaid产卵saysaidsaid说ABBABB型型6.动词原形结尾动词原形结尾eepeep eptept eptept 原形原形过去式过去式过去分词过去分词中文意思中文意思keepkeptkept保持sleepsleptslept睡觉sweepsweptswept打扫(5) ABC(5) ABC型型（动词原形、过去式与过去分词三者不同形）（动词原形、过去式与过去分词三者不同形）1. ow ew own（在（在原原形基础上形基础上加加n) 原形原形过去式过去式过去分词过去分词中文意思中文意思blowblew

16、blown吹drawdrewdrawn画growgrewgrown生长knowknewknown知道flyflewflown飞2. ia u 原形原形过去式过去式过去分词过去分词中文意思中文意思beginbeganbegun开始ringrangrung响铃singsangsung唱歌swimswamswum游泳sinksanksunk沉没drinkdrankdrunk喝3. 原形原形过去式过去式过去式过去式+(e)n 原形原形过去式过去式过去分词过去分词中文意思中文意思wearworeworn穿forgetforgotforgotten忘记speakspokespoken说freezefrozefrozen冻choosechosechosen选择4. 原形原形过去式过去式原形原形+(e)n 原形原形过