2023年英语三升四暑假讲义第13讲：一般疑问句&否定句 牛津上海版试用本

授课主题 第13讲：一般疑问句&否定句 教学目标 1. 了解一般疑问句的特点；掌握陈述句变一般疑问句的方法 2. 掌握否定句的改法 教学重难点 重点：一般疑问句和否定句的具体运用 难点：但主语是第三人称单数时助动词的选择 教学内容 Count to one Hundred Before You Speak 数到一百再说 In class,the teacher,with his back leaning against the stove,said to the students,"Before you speak,you should think and count to at least 50,and for important matters to 100." No sooner had the teacher stopped talking than the students began to count. At last all the students shouted together,"1...98,99,100.teacher,your clothes are on fire." 课堂上，老师背靠火炉站着，对学生们说：“说话前要三思，起码数到50，重要的事情要数到一百。” 老师的话音刚落，学生立刻从“1”开始数起来。最后一起喊：“98，99，100！老师，您的衣服着火了。” 一、肯定句变否定句 1. 含有be动词时，直接在be动词后加not: 主语+be+not+... I am a student. → I am not a student. 2.含有情态动词(can)，直接在后面加not: 主语+can/ must+not+动原+... She can ride a bicycle.→ She can’t ride a bicycle. Her mother can cook dinner well. → Her mother can’t cook dinner very well. 3. 含有实义动词时，在主语后加don’t / doesn’t+动词原形: 主语+don’t / doesn’t+动词原形+... She likes running. → She doesn’t like running. I go to school by bus. → I don’t go to school by bus. His father works in a big company. → His father doesn’t work in a big company. 【注意】 1.当主语是第一、二人称或复数时，主语+don’t; 当主语第三人称单数时，主语+doesn't. 2.some变为any: There are some birds in the tree.→ There aren't any birds in the tree. 若表示邀请、请求的句子中，some可以保持不变。： Would you like some orange juice? 3.and变为or I have a knife and a ruler. → I don't have a knife or a ruler. She can dance and sing. → She can’t dance or sing. 【巩固练习1】 将下列肯定句改为否定句: 1.I like you. ___________________________________________________________________________ 2.You sing English songs well. ___________________________________________________________________________ 3.The dog runs fast. ___________________________________________________________________________ 3.He can draw and fly. ___________________________________________________________________________ 4.There are some apples on the tree. ___________________________________________________________________________ 5