小学英语句型转换之肯定句变否定句学习教案.pptx
小学英语小学英语(yn y)句型转换之肯定句变否句型转换之肯定句变否定句定句第一页,共8页。一、概念一、概念(ginin):什么是肯定句和否定句:什么是肯定句和否定句?肯定肯定(kndng)形式形式肯定肯定(kndng)句句否定否定(fudng)形式形式否定否定(fudng)句句陈述句陈述句陈述句:说明一件事情、一个想法,提出一个观点或表陈述句:说明一件事情、一个想法,提出一个观点或表达自己心情的句子。特点是:句末都是句号,用降调读!达自己心情的句子。特点是:句末都是句号,用降调读!第1页/共8页第二页,共8页。肯定句变否定句的方法肯定句变否定句的方法(fngf)1.含“be动词(dngc)和情态动词(dngc)”型,直接在be动词(dngc)或情态动词(dngc)后加not,其它照抄不变。be动词(dngc)包括:am,is,are,was,were.常见的情态动词(dngc)有:can,could,would,will,may等等。例句:I am a student.I am not a student.He is a boy.He is not/isnt a boy.I can speak English.I can not/cant speak English.第2页/共8页第三页,共8页。肯定句变否定句的方法肯定句变否定句的方法(fngf)注意注意(zh y)(zh y)缩写:缩写:is not=isnt,are not=arent,is not=isnt,are not=arent,was not=wasnt,were not=werent,was not=wasnt,were not=werent,am not am not没有缩写,没有缩写,但是但是I am=ImI am=Im can not=cant,would not=wouldnt can not=cant,would not=wouldnt could not=couldnt,will not=wont could not=couldnt,will not=wont第3页/共8页第四页,共8页。肯定句变否定句的方法肯定句变否定句的方法(fngf)2.含“实意(shy)动词”型,转换否定句时,记住五个字“一加一还原”的原则。“一加”即在实意(shy)动词前加助动词的否定dont,doesnt或didnt。“一还原”即把句中的实意(shy)动词变回原形。注意:在一般现在时中,当主语是第一(dy)、二人称或复数时,加dont来否定;当主语是第三人称或单数时,加doesnt来否定;在一般过去时中,一律用didnt来否定。例句:I like apples.I dont like apples.He likes apples.He doesnt like apples.She worked last night.She didnt work last night.第4页/共8页第五页,共8页。肯定句变否定句的方法肯定句变否定句的方法(fngf)要注意的特殊情况要注意的特殊情况(qngkung)(qngkung):遇到遇到some some 变变 any;any;遇到遇到too/alsotoo/also变变either;either;遇到遇到and and 变变 or;or;遇到遇到always always 变变 nevernever。例句(lj):1.There are some boys in the classroom.There arent any boys in the classroom.2.The girl can sing and dance.The girl cant sing or dance.第5页/共8页第六页,共8页。相关(xinggun)练习:1.Mike would like some chicken.Mike_like _ chicken.2.Heoftengoestobedatten.He often _ _ to bed at ten.3.Mary is a teacher,too.Mary _ a teacher,_.4.They went to Shanghai yesterday.They _ _to Shanghai yesterday.wouldntanydoesnt isnteitherdidnt gogo肯肯定句定句变否定句变否定句第6页/共8页第七页,共8页。Thank youThank you 第7页/共8页第八页,共8页。