小学英语语法素材-一般现在时.ppt

1、一般现在时讲解 在一般现在时中，当主语是第三人称单数时，谓语动词要用第三人称单数形式，即常在动词原形后加-s或-es。但有些同学们对于哪些主语是第三人称单数还不十分清楚，现归纳总结如下：一、人称代词he,she,it是第三人称单数。如：He likes watching TV.他喜欢看电视。She has lunch at twelve.她十二点吃午餐。二、单个人名、地名或称呼作主语；是第三人称单数。如：Han Mei likes salsd .韩梅喜欢萨拉。Beijing is in China.北京在中国。Uncle Wang often plays volleyball.王叔叔经常打排球

2、。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。如：This book is yours.这本书是你的。That car is red.The cat is Lucys.这只猫是露茜的。四、不定代词someone,somebody,nobody,everything,something等及指示代词this,that作主语时，是第三人称单数。Everyone is here.大家到齐了。There is a watch on the table.桌上有块手表。This is a pen.这是一支钢笔。That is an eraser.五、不可数名词作主语时

3、为第三人称单数。如：1.一般现在时的基本用法：1)经常性或习惯性的动作，常与表示频率副词的时间状语连用。通常与副词every day（每天），always（总是）,usually（通常）,often（经常）sometimes（有时）,等时间状语连用。例：（1）表示事物或人物的特征、状态。例如：I wake up at six Oclock every morning.My friends often go to the park on Sundays.2)用于表示客观真理，客观存在，科学事实。例如：The earth moves around the sun.地球绕着太阳转。Tomorrow

4、is Tuesday.明天是星期二 3)用于格言或警句中。例如：Where there is a will,there is a way.有志者事竟成。4)用于表示现在时刻的状态、能力、性格、个性。例如：She is a good girl and always help others.她是一个好女孩，经常帮助别人。My watch is very new。我的手表很新。2.一般现在时的构成：当主语是第一人称，第二人称或第三人称复数时，谓语动词要用动词原形。当主语是第三人称单数时，谓语动词要用第三人称单数形式 动词三单形式的变化规则：1.（1）多数直接在动词词尾加-s.play plays l

5、ike likes ask-asks work-works get-gets call-calls（2）以字母s,x,ch,sh或o结尾的动词，在词尾直接加-es.watch-watches wish-wishes do-does go-goes（3）以“辅音字母加-y”结尾的动词，要先变y为i再加-es.try-tries study-studies cry-cries fly-flies2.不规则变化：be-is have-has3.一般现在时的句子转换：（1）当句子中有be动词或情态动词时，则把be动词或情态动词提到主语的前面变成疑问句;在be动词或情态动词后面加not变成否定句.（2）

6、当句子中即没有be动词，也没有情态动词时，则在主语前加助动词do,does变成问句；在主语后谓语动词前加助动词dont,doesnt变成否定句，助动词后的谓语动词要变成动词原形。一般现在时态专练 二、用Be动词填空。1.youLi Fen?No,I not.2.Mr.green very busy?Yes,he.3.This bookvery interesting.4.What class you in?5.You and I good friends.6.The basketball club fun.一、用括号中所给词的适当形式填空；1I often _(go)swimming on S

7、unday.2My daughter _(watch)TV every day.Sometimes she _(see)a film on Sunday.3Li Wei _(have)a daughter.4Her mother _(teach)English at a middle school.5Jack often _(listen)to the radio.6He _(say)that Li Lei is tired.gowatchesseeshasteacheslistenssays二、用括号内动词的适当形式填空。1.He often _(have)dinner at home.2.

8、Daniel and Tommy _(be)in Class One.3.We _ _(not watch)TV on Monday.4.Nick _ _(not go)to the zoo on Sunday.5._ they _(like)pears?6._ your parents _(have)eggs every day?7.There _(be)some water in the bottle.18.Mike _(like)cooking.9.They _(have)the same hobby.10.Liu Tao _ _(do)not like PE.11.This boy o

9、ften _(watch)TV in the evening.二、将下列句子变成否定式和疑问式：1We go to school at night.2My brother works in a factory.3Her name is Mei Ling.We dont go to school at night.Do you go to school at night?My brother doesnt work in a factory.Does your brother work in a factory?Her name isnt Mei Ling.Is her name Mei Lin

10、g?4You have got a red pencil.5She has lunch at home.You havent got a red pencil.Have you got a red pencil?She doesnt have lunch at home.Does she have lunch at home?三、按照要求改写句子1.Daniel watches TV every evening.(改为否定句)_2.I do my homework every day.(改为一般疑问句，作否定回答)_3.She likes milk.(改为一般疑问句，作肯定回答)_ 4.Amy likes playing computer games.(改为一般疑问句，作否定回答)_5.We go to school every morning.(改为否定句)_6.John comes from Canada（加拿大）.(对划线部分提问)_7.She is a good student.(改为一般疑问句，作否定回答)_