1、14 动词三单式的变化规律He often goes to work by bus.Miss Green lives in Beijing.三单式是第三人称单数的简称。一般现在时态中,主语是第三人称单数(he,she,it)或具体的个人或个物时,动词要用三单式。get make read live walk eatgets makesreadsliveswalks eats观察一:试总结下列动词三单式的规律知识1多数动词直接在词尾加s,清辅音后读/s/,浊辅音或元音后读/z/.在/t/后与/t/一起发/ts/音,在/d/后与/d/一起发/dz/音。stopmakeplaylivecomessw
2、orkssss/s/z/reads/dz/ts/writesstudy try carry copystudiestriescarriescopies观察二:下面单词变形有何规律?知识2以辅音字母+y结尾的动词,把 y变为 i 再 加 es,读/iz/.fliesflycopiescopytrytriesstudystudies teach guess catch fixteachesguesses catchesfixes观察三:上述单词变形有何规律?知识3以ch,sh,s,x 结尾的动词,在后面加 es,读/iz/.missesmisspassespassbrushbrusheswatch
3、watches知识4以o 结尾的动词,在后面加 es,读/z/.doesdogogoes/dz/知识5除了上述基本规律之外,英语中还存在一些无 规则的第三人称单数变形。这些需要我们特别 记忆.hashavebeis用所给单词的适当形式完成句子:1.He often _ basketball.(play)解析:根据句意,他经常打篮球,句子为一般现在时,主语是第三人称单数,动词要用三单式,play的三单式为plays.playsgoes解析:根据句意,我父亲每天7点去上班,句子为一般现在时,主语是第三人称单数,动词要用三单式,go以o结尾,其三单式应加es,所以应填goes.2.My father
4、 _ to work at 7:00 every day.(go)用所给单词的适当形式完成句子:1.The plane _ from Beijing to NewYork.(fly)解析:根据句意,这是从北京飞往纽约的飞机,句子为一般现在时,主语是第三人称单数,动词要用三单式,fly是辅音+y结尾的动词,其三单式应把y变i再加es,故应填flies.flieswatches解析:本句意思是,Jane星期天总是看电视,根据所学语法知识可知动词要用三单式,watch以ch结尾,其三单式应加es,故应填watches.2.Jane always_ TV on Sunday.(watch)He oft
5、en _(have)dinner at home.A.has B.have C.havesC根据句意,他经常在家吃晚饭,根据所学语法知识可知动词要用三单式,have的三单式是has,属不规则变化,应着重记忆。A易错1单项选择ALiu Tao _(do)not like PE.A.do B.does C.dosA B易错2单项选择根据句意,Liu Tao不喜欢体育课,根据所学语法知识可知动词要用三单式,do是以o结尾的,其三单式应加es,故应选does.BThe girl _(teach)us English on Sundays.A.teachs B.teaches C.teachA本句意思是这女孩星期天教我们英语,根据所学语法,动词要用三单式,teach以ch结尾,其三单式应加es,故应选teaches.B易错3单项选择 B以o 结尾的:在后面加 es一般动词后面直接加-s.以ch,sh,s,x 结尾的,在后面加-es以辅音字母+y结尾的:把 y变为 i 再加-es.不规则的变化goesdoescleans gets likes walkswatches fixes misses washesfly|flies study|studieshave-has