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.一般现在时一般现在时（肯定句）（肯定句）哪些主语是第三人称哪些主语是第三人称单数单数?主语为主语为第三人称单数第三人称单数，动词要按规则加上动词要按规则加上s s或或eses，一、一、he,she,ithe,she,it是第三人称单数是第三人称单数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、单数可数名词或三、单数可数名词或this/that/the+this/that/the+单数可数名词单数可数名词 作主作主语时，是第三人称单数语时，是第三人称单数动词动词+s的变化规则的变化规则 1一般情况下，直接加一般情况下，直接加-s，如：如：stop-stops,come-comes 2 以以s.x.sh.ch.o结尾，加结尾，加-es，如：，如：do-does,watch-watches,go-goes 3以以“辅音字母辅音字母+y”结尾，变结尾，变y为为i,再加再加-es，如：如：study-studies 一般现在时一般现在时（否定句）（否定句）1、I am a teacher.否：否：I am not a teacher.2、He is a student.否：否：He is not a student.3、You are a boy.否：否：You are not a boy.4、I can swim.否：否：I can not（cant)swim.否定句在否定句在bebe动词和动词和情态动词后加情态动词后加notnot 一般现在时一般现在时（否定句）（否定句）无无bebe动词或情态动词时动词或情态动词时主语第三人称单数主语第三人称单数 动词前加动词前加does not does not(doesnt)(doesnt)主语是非单三主语是非单三 动词前加动词前加 do notdo not（dont)dont)一般现在时一般现在时（否定句）（否定句）1 1、I to school by bus.I to school by bus.否：否：I to school by bus.I to school by bus.2 2、He to school by bus.He to school by bus.否：否：He to school by bus.He to school by bus.gogodont godont gogoesgoesdoesnt godoesnt go用一般现在时态描述下your good friend Mike一般现在时一般现在时（疑问句）（疑问句）有有bebe动词或情态动词时动词或情态动词时bebe动词或情态动词动词或情态动词cancan提前，首字母变为提前，首字母变为大写大写；some some 变变anyany一般现在时一般现在时（一般疑问句）（一般疑问句）He He is is a student.You a student.You areare a boy.a boy.Is Is he a student he a student？Are Are youyou a boya boy？I I cancan swim.I swim.I amam a teacher.a teacher.Can Can you swim you swim？Are Are youyou a teachera teacher？一般现在时一般现在时（一般疑问句）（一般疑问句）1、I to school by bus.疑疑问问句：句：you to school by bus.2、He to school by bus.疑疑问问句：句：he to school by bus.DoesDoesgogogoesgoesgogogogoDoDo特殊疑问句时间时间：when 地点地点：where人人：who 物物：what状态状态：how 年龄年龄：how old价钱价钱：how much 数量数量：how many特殊疑问句有有bebe动词或情态动词动词或情态动词:疑问词疑问词+be or+be or 情态动情态动词词+主语主语+其它其它特殊疑问句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?特殊疑问句没有没有bebe动词或情态动动词或情态动词：词：疑问词疑问词+do+do（doesdoes）+主语主语+动词原形动词原形+其它其它特殊疑问句（时间）He goes to school at seven.When does he go to school？单数第三人称：单数第三人称：非单数第三人称：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？单数第三人称单数第三人称：非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：单数第三人称：非单数第三人称：非单数第三人称：We go to school by bus.How do you go to school？。