一般现在时之否法句 系动词 情态动词等.pptVIP

一般现在时之否法句 一、系动词Be系列的否定句 二、情态动词系列的否定句 三、行为动词系列的否定句 什么是否定句？ 对事物做出否定判断的句子就是否定句。 一、系动词be系列的否定句的构成 主语 + be + not + 其他 is not = are not= isnt arent 1.Kitty (not) an English girl. 2.We (not) students. 3.I (not) from Taizhou. 4.She (not) tall. 5.Lucy and Lily （not）good friends. 6.Those chairs (not) broken. 7.The bag (not) mine. isnt arent am not isnt arent arent isnt 二、情态动词系列的否定句的构成 主语 + 情态动词 + not + 动词原形 + 其他 can not = could not = must not = would not = will not = should not = may not = cant couldnt mustnt wouldnt wont shouldnt may not She (can not) speak English. You (must not) open the door. They (should not) be right. I (will not) go to Japan. cant mustnt shouldnt wont 三、行为动词系列的否定句的构成 主语 + 助动词（do/does）+not +行为动词原形 + 其他 什么时候用助动词do，does呢？ 当行为动词是第三人称单数形式时，用助动词does。 当行为动词是原形时，用助动词do。 do not = does not= dont doest These boys do not like playing football. The girl does not read English every morning. 2、The girl reads English every morning. 1、These boys like playing football. 一找 找行为动词 二变 变助动词（do、does）+行为动词原形 三加 在助动词后面加not 1.I like red. 2.They like orange. 3.We walk to school every day. I dont like red. They dont like orange. We dont walk to school every day. 10 4. His brother plays football after school. 5. It looks like a hat. 、 6. She has a cat at home. His brother doesn’t play football. It doesn’t look like a hat. She doesn’t have a cat at home. 11