I am a teacher.,I have many students.,Yesterday, I had 4 lessons.,I always helps my students to solve problem.,以上的句子都是一般现在时吗？它们有什么特征？,1、I am a teacher. 2、He is a student. 3、You are a boy. 4、I can swim.,一般现在时 （肯定句）,哪些主语是第三人称单数?,主语为第三人称单数，动词要按规则加上s或es，,一、he, she, it是第三人称单数。,He likes watching TV. 他喜欢看电视。 She has lunch at twelve. 她十二点吃午餐。 It looks like a cat. 它看起来像只猫。,二、单个人名、地名或称呼作主语；是第三人称单数。,Han Mei looks like her mother. 韩梅看起来像她的母亲 Beijing is in China. 北京在中国。 Uncle Wang often makes cakes. 王叔叔经常做蛋糕。,A panda is a shy animal. 熊猫是害羞的动物。 This book is yellow. 这本书是黄色的。 That car is red. 那辆小汽车是红色的。 The cat is black. 这只猫是黑色的。,三、单数可数名词或this / that / the+单数可数名词作主语时，是第三人称单数。,动词+s的变化规则 1一般情况下，直接加-s， 如：stop-stops, come-comes 2 以s. x. sh. ch. o结尾，加-es，如：do-does, watch-watches, go-goes 3以“辅音字母+y”结尾，变y为i, 再加-es， 如：study-studies,一般现在时 （否定句）,1、I am a teacher.否：I am not a teacher. 2、He is a student.否： He is not a student. 3、You are a boy.否： You are not a boy. 4、I can swim.否： I can not（cant) swim.,否定句在be动词和情态动词后加not,一般现在时 （否定句）,无be动词或情态动词时 主语第三人称单数 动词前加does not (doesnt) 主语是非单三 动词前加 do not（dont),一般现在时 （否定句）,1、I to school by bus. 否： I to school by bus. 2、He to school by bus. 否：He to school by bus.,go,dont go,goes,doesnt go,用一般现在时态描述下your good friend Mike,一般现在时 （疑问句）,有be动词或情态动词时 be动词或情态动词can提前，首字母变为大写；some 变any,一般现在时 （一般疑问句）,He is a student. You are a boy. Is he a student？ Are you a boy？ I can swim. I am a teacher. Can you swim？ Are you a teacher？,一般现在时 （一般疑问句）,1、I to school by bus. 疑问句： you to school by bus. 2、He to school by bus. 疑问句： he to school by bus.,Does,go,goes,go,go,Do,特殊疑问句,时间：when 地点：where 人：who 物：what 状态：how 年龄：how old 价钱：how much 数量：how many,特殊疑问句,有be动词或情态动词: 疑问词+be or 情态动词+主语+其它,特殊疑问句,She can speak English. What can she speak？ He is ten. How old is he？ He is at home. Where is he ？ Its 3 dollars. How much is it?,特殊疑问句,没有be动词或情态动词： 疑问词+do（does）+主语+动词原形+其它,特殊疑问句（时间）,He goes to school at seven. When does he go to school？,单数第三人称：,非单数第三人称：,I go to school at six. When do you go to school？,特殊疑问句（地点）,He has lunch at school. Where does he have lunch？,单数第三人称：,非单数第三人称：,Children have lunch at school. Where do children have lunch？,特殊疑问句（状态）,He goes to school by bus. How does he go to school？,单数第三人称：,非单数第三人称：,We go to school by bus. How do you go to school？,