神马作文网变否定句什么时候用NOT什么时候用DO NOT
来源：学生作业帮 编辑：神马作文网作业帮 分类：英语作业 时间：2024/11/13 14:21:03
变否定句什么时候用NOT什么时候用DO NOT
陈述句变否定句的方法：
句中有动词be( am ,is ,are ,was ,were),情态动词（can / could ,may ,must ,will ,would 等）,助动词（如完成时态中的HAS / HAD ）,变否定句时直接在这些词后加NOT ；否则要加助动词Do ,Does （主语第三人称单数）,Did （一般过去时）,原来的动词要还原；另外,句中有SOME 是一般改为ANY ,如果有AND 要改为OR,（因为否定句中的并列要用OR）already 改为yet（且放在句末）；
祈使句的否定句是直接在句首加Don’t ; ( 如Open the doo r,please .-> Don’t open the door ,please .) 不定式的否定句是在不定式前加NOT ,如 She asks the boy not to play in the street .
再问： 你好可以再给五到十个例句么
再答： 1 He is a student.- He isn't a student. 2 He can swim . - He can't swim. 3 She will go to Beijing .- She won't go to Beijing. 4 I have finished my homework. - I haven't finished my homework. 5 Close the window . - Don't close the window.
句中有动词be( am ,is ,are ,was ,were),情态动词（can / could ,may ,must ,will ,would 等）,助动词（如完成时态中的HAS / HAD ）,变否定句时直接在这些词后加NOT ；否则要加助动词Do ,Does （主语第三人称单数）,Did （一般过去时）,原来的动词要还原；另外,句中有SOME 是一般改为ANY ,如果有AND 要改为OR,（因为否定句中的并列要用OR）already 改为yet（且放在句末）；
祈使句的否定句是直接在句首加Don’t ; ( 如Open the doo r,please .-> Don’t open the door ,please .) 不定式的否定句是在不定式前加NOT ,如 She asks the boy not to play in the street .
再问： 你好可以再给五到十个例句么
再答： 1 He is a student.- He isn't a student. 2 He can swim . - He can't swim. 3 She will go to Beijing .- She won't go to Beijing. 4 I have finished my homework. - I haven't finished my homework. 5 Close the window . - Don't close the window.