1 七年级上册知识点总结一般现在时一般疑问句和否定句的变法 一、 先将句子分成三类：1）含有am, is, are 的句子。 2）含有行为动词的句子，（如like，have，play，eat，run，need） 3）含有情态动词的句子，如can。 (1) 如果是第一类，即含有am, is, are 的句子。只将把am, is, are 调到句首。I am 和We are 要变成are you，some 变成any，my变成your，句末用问号。否定句只在be 后加not。如am---am not； is ---isn’t； are----aren’t。如： ① I am a boy. （否定句）----- I am not a boy. (变成一般疑问句) -----Are you a boy? Yes, I am. No, I’m not. ② She is my mother.( 变成一般疑问句) -----Is she your mother? Yes, she is. No, she isn’t. ③ This is a book.( 变成一般疑问句) ------Is this a book? Yes, it is. No, it isn’t. ④ These are strawberries.( 变成一般疑问句) ----Are these strawberries? Yes, they are. No, they aren’t. ⑤ There is some chicken on the table.( 变成一般疑问句) -----Is there any chicken on the table? Yes, there is. No, there isn’t. (2)如果是第二类，即含有行为动词的句子（如like，have，play，eat，run，need 等）时，要分两步看主语。 ①I / We / You / They 时，要借助于助动词do 的帮助来变成一般疑问句。即句型为： Do + 主语 + 动词原形 + 其他？否定句只在动词原形前加don’t。 例如：①②③④ I have some tomatoes in my backpack.(否定句)I don’t have any tomatoes in my backpack. ( 变成一般疑问句)-----Do you have any tomatoes in your backpack? Yes, I do. No, I don’t. We play sports every day.（否定句）---We don’t play sports every day. ( 变成一般疑问句)----Do you play sports every day? Yes, we do. No, we don’t. ②He / She / It 时， 要借助于助动词does 的帮助来变成一般疑问句。即句型为： Does + 主语 + 动词原形 + 其他？否定句只在动词前加doesn’t，然后将单三还原成原形。 She watches TV every evening. (否定句)---She doesn’t watch TV every evening. ( 变成一般疑问句)----Does she wa...
