英语五年级【知识精讲】16.句型(2)否定句课件PPT

这是一份英语五年级【知识精讲】16.句型(2)否定句课件PPT，共13页。PPT课件主要包含了Content，什么是否定句，如何变否定句，否定句牛刀小试，否定句，试试吧等内容，欢迎下载使用。

1．简单句中含有系动词be、情态动词和助动词时，变否定句时需在系动词be、情态动词和助动词后加nt
I am a teacher． → I am nt a teacher.He can help me． → He can’t help me.She is reading a bk．→ She isn’t reading a bk．
2．简单句中谓语动词为实意动词时，要根据时态选用d的相应形式，且实意动词要变回原形
I like swimming．→ I dn’t like swimming．He did his wrk yesterday． → He didn’t d his wrk yesterday．
3．祈使句变否定句时，一般在句首加Dn’t，Let’s开头的祈使句也可以在 Let’s后加nt
Put them ver there．→ Dn’t put them ver there． Let us g hme． → Let us nt g hme．
4. n：一般用于名词之前，表达“没有……”之意
There were cars and buses in my time.→ There were n cars r buses in my time.
按要求完成句子。Mike made a mdel f a Chinese spaceship. (改为否定句)Mike  ______  ______  a mdel f a Chinese spaceship.
答案：didn’t, make解析：肯定句中有实意动词made，且该句为一般过去时， 故变否定句时要用didn’t，且实意动词变回原形。
单项选择。I _____ cmputer class.A. dn't likeB. am nt likeC. nt like
答案：A解析：选项中都有实意动词，变否定句时需要助动词d/des/did。