动词第三人称单数变化规则如下

1、高三英语复习动词第三人称单数变化规则例如： works gets says reads1) 一般情况下，动词后面直接加-S.wash-washes2) 以ch,sh,s,x 或0结尾的动词,在后面加-es。 例如：go-goesteach-,teachebrush-brushes ,catch-catches ,do-does ,fix -fixes3）以辅音字母+ y结尾的动词，把y变为i再加-es.例如：study-studiestry-triescry-criescarry-carries ,fly-flies现在分词变化规则1. 直接 + ing( 例: sleep+ing sleep

2、ing)2. 去 e+ing( 例: bite-e+ing biting)3重读闭音节，且末尾只有1个辅音字母，双写辅音字母+ing(例：sit+t+ingsitti ng),tie-tying4.特殊变化：die-dying,lie-lying 3、现在分词的变化规则：ing(1) 一般情况下，直接在动词后加-work - worki ngslee p slee pingstudy study ing(2) 动词以不发音的一e结尾，要去一e加一ingtake tak ingmake maki ngdance dancing(3) 重读闭音节的动词，要双写词尾字母，再加ingcut cutt

3、ingput pu tt ingbeg inbeg inning(4) 以一ie结尾的动词，把变成y再加一 inglie lyi ngtie tyi ng die dying比较级最咼级important difficultmore imp orta ntmore difficultmost imp orta ntmost difficultin teresti ngusefulmore in terest ingmore usefulmost in terest ingmost usefulI.学会下列形容词的比较级和最高级: 原级比较级最咼级1. talltallertalleststro

4、 ng oldstro ngerolderstron gestoldest2. largefinelargerfinerlargestfin est形容词的比较级和最高级变化形式规则如下构成法原级比较级最高级一般单音节词末尾加er和eststro ngstron gerstro ngest单音节词如果以e结尾，只加 r和ststra ngestra ngerstra ngest闭音节单音节词如末尾只有一个辅音字sad big hotsadder bigger hottersaddest biggest hottest母，须先双写这个辅音字母，再加er和 est 少数以 y, er（或 ure）

5、,ow, ble结尾的双音节词，末尾加 er和 est（以/结尾的词，女口y前是辅音字母，把y变成，再加 er和 est，以 e结尾的词仍加r 和 st）an gry clever n arrow noblean grier cleverer n arrower n obleran grest cleverest n arrowest n oblest其他双音节和多音节词都在前面加单词more 和 mostdiffere ntmore differe ntmost differe ntb.其他词都在前面加more, most构成比较级及最高级: 原级latelaterlatest3. bigb

6、iggerbiggesthothotterhottestthinthinnerthi nn est4. easyeasiereasiestbusybusierbusiesthappyhapp ierhapp iest5. valuablemore valuablemost valuabledan gerousmore dan gerousmost dan gerouscomfortablemore comfortable most comfortable1.有几个形容词有特殊的比较级和最高级形式:原级比较级最咼级goodwell betterbestbadill worseworstmanym

7、uch moremostlittlelessleastfar fartherfurther farthestfurthestold olderelder oldesteldestle结尾的词,er,原级比较级最咼级n arrown arrowern arrowestclevercleverercleverestsim piesim piersimp lestcom moncom monercom monest3.也有少数单音节词可以加more和most的办法构成比较级和最高级:原级比较级最咼级P leasedmore pl easedmost p leasedtiredmore tiredmo

8、st tiredgladmore gladmost glad2.双音节词除了以“辅音+ y”结尾的词外，还有以ow, 和个别其他双音节词，可以用加词尾的办法构成比较级和最高级:名词的复数形式构成方法例词以 S、 x、 sh、在词尾加-s1.ch结尾的名词后加-es2.如词尾是e,只 如词尾为 -f或-fe , 则一般变为-ves 以辅音+y结尾的名词，变y为i再加-es以元音+y结尾的名词，加-s以辅音+0结尾的名词，加-es以元音+0结尾的名词，加-s以-th结尾的名词，加-s英语里有一些名词的复数形式不是以词尾-s或-es构成,构成方法例词变内部元音foot u feeti:man men

9、 e mouse au mice ai woma n wome n e 词尾加-enox oxe n（公牛）child ai childre n i 形式不变（通形名词-单、复数同形）deerdeer fish fishsheepsheep集合名词（只有复数，没有单数。）trouserspeople（人，人民）glasses（眼镜）名词做定语1.apple tree apple1.只在后面名词加复数trees2.man, woman随之后面的名词2.man doctor me而变化，后单其单，后复其复。doctors3.sport作定语永远用作复数。3.sp ortsshopsp orts s

10、hoes表示国籍的名词Chin ese -Chin ese（中日不变，英法变，其余词后加 s）JapaneseJapaneseEn glishma n En glishme nFren chman Fren chme nAmerica nAmerica ns其它名词复数的规则变化1）以y结尾的专有名词，或元音字母+y结尾的名词变复数时，直接加s变复数: 如:two Marys the Henrysmonkey-mon keys holiday-holidays比较： 层楼：storey -storeys story-stories2）以o结尾的名词，变复数时：a. 力卩 s，如： photo-

11、photos piano-pianosradio-radios zoo-zoos；b.c.力卩 es，如：potato-potatoes tomato-tomatoes 均可，如：zero-zeros / zeroes3）以f或fe结尾的名词变复数时：a.力卩 s，如： belief-beliefs roof-roofs safe-safes gulf-gulfs ；b. 去 f,fe力卩 ves，如：half-halveskni fe-k ni ves leaf-leaves wolf-wolves wife-wives life-lives thief-thievesc. 均可,如:han

12、dkerchief:han dkerchiefs / han dkerchieves动词变名词1.在词尾加er,r ,双写加er或or:A. play _ player, sing _ singer, wait _ waiter , find _ finder, thrill _ thriller，hunt-hunterB. write _ writer, drive _ driver, come _ comer, explore _ explorer dance _ dancerC. run _ runner, win _ winner, rob _ robber, traval _ tra

13、vallerD. visit _ visitor, invent _ inventor,act-actor,advise-advisor2. 在词尾加 ing:build _ building, draw _ drawing, end _ ending, begin _ beginning, swim _ swimming ， skate _ skating, feel _ feeling, say _ saying, mean _ meaning, cross _ crossing ， surf _ surfing, paint _ painting 3. 在词尾加 ion 或去 e 加 i

14、on:A. decide _ decision, describe _ description, produce _ production, celebrate _ celebration,pronounce _ pronunciation, decoratedecorationgraduate _ graduation,frustrate - frustration,pollute _ pollution contribute _ contribution, congratulate _ congratulation, educate _ education ， organize _ orgnization,donate _ donation, appreciate _ appreciation ，operate _ operation, invite _ invitation B. discuss _ discussion, invent _ invention, attract _ attraction impress _ impression,inject _ injection,instruct _ instruction 4.其它：_ death, succeed _ success, weigh _