1、行为动词的一般现在时态1 1、定义：表示、定义：表示经常性、习惯性的动经常性、习惯性的动作或现在的状态作或现在的状态，就用一般现在时，就用一般现在时态。态。2 2、一般现在时态的、一般现在时态的基本句子结构基本句子结构:主语主语+谓语动词谓语动词+其他其他成份成份请注意：请注意：主谓保持一致。主谓保持一致。（1 1）主语是）主语是I I、wewe、youyou、theythey以及以及名词复数名词复数时，谓语时，谓语动词用原形动词用原形。否。否定形式：定形式：动词前加动词前加dontdont（即（即dont+dont+动词原形）动词原形）。一般疑问句：。一般疑问句：在句首加助动词在句首加助动词
2、do.do.(Yes,(Yes,主语主语+do./No,+do./No,主语主语+dont.)+dont.)例如：例如：1.I like maths.(否定句和一般疑问句及回答）否定句和一般疑问句及回答）I dont like maths.Do you like maths?Yes,I do./No,I dont.2.Lessons start at eight oclock.（同上）（同上）Lessons dont start at eight oclock.Do lessons start at eight oclock?Yes,they do./No,they dont.（2 2）主语是
3、）主语是第三人称单数第三人称单数hehe、sheshe、itit以以及名词单数及名词单数时，时，谓语动词要用第三人称谓语动词要用第三人称单数形式（动词要加单数形式（动词要加-s-s）；否定形式：）；否定形式：动词前加动词前加doesntdoesnt，其后动词要变为原，其后动词要变为原形（即形（即doesnt+doesnt+动词原形）动词原形）；一般疑；一般疑问句：问句：在句首加助动词在句首加助动词doesdoes，其后，其后动词动词要要变为原形。变为原形。(Yes,(Yes,主语主语+does./No,+does./No,主语主语+doesnt.+doesnt.)例例 如：如：1.It eat
4、s meat.It doesnt eat meat.Does it eat meat?Yes,it does./No,it doesnt.2.Tony likes football.Tony doesnt like football.Does Tony like footabll?Yes,he does./No,he doesnt.3.3.动词的第三人称单数形式动词的第三人称单数形式变化规则：变化规则：（1）规则变化：与名词变为复数的规则一样。与名词变为复数的规则一样。a a、一般在词尾加、一般在词尾加-s-s；如如 like likes s eat eats s wantwants sb b
5、、以、以s s，x x，chch，shsh结尾，加结尾，加-eses；如如watchwatchesesc c、以辅音字母以辅音字母+y+y结尾，变结尾，变y y为为i i再加再加-eses；d d、以辅音字母以辅音字母+o+o结尾，加结尾，加-eses.如如 do doeses gogoeses（2）不规则变化：havehave是动词原形，其动词的是动词原形，其动词的第三人称单数形式是第三人称单数形式是hashas。Practice 用所给词的正确形式填空:1.I _(go)to bed at 10 oclock.2.The panda_(eat)bamboo and it_(not eat)
6、grass.3.We _(have)lessons on weekdays.4.It _(look)like a monkey.5.Betty_(like)English,but she _（not like)maths.goeatsdoesnt eathavehavelookslookslikelikes sdoesnt doesnt likelike6._ pandas _(eat)meat?6._ pandas _(eat)meat?No No,they _(not eat)meat.,they _(not eat)meat.7._ Tony _(watch7._ Tony _(watc
7、h）TV?TV?Yes.But he_(not watch)Yes.But he_(not watch)TV on weekdays.TV on weekdays.8.She _8.She _（havehave）a big house with a big house with a swimming poola swimming pool（游泳池）（游泳池）.DoDoeaeat tdont dont eateatDoesDoeswatchwatchdoesnt doesnt watchwatchhashas易错题易错题:1、表示“有；拥有”，英式英语have/has got，美式英语have/
8、has.在变为否定句和一般疑问句时变法不同。have/has got否定句：否定句：在在have/has后加后加not。一般疑问句：将一般疑问句：将have/has提至句首。提至句首。（have/has got中的中的have/has是助动词，无意义）是助动词，无意义）E.g We havent got lots of apples.Have we got lots of apples?Yes,we have.但行为动词行为动词have/has(have/has(有；吃；喝）的否定句和有；吃；喝）的否定句和一般一般疑问句疑问句：不能在：不能在have/hashave/has后加后加notnot
9、或将或将have/hashave/has提提至句首。至句首。E.gE.g：（1）We have lunch at 12 oclock.否：We dont have lunch at 12 oclock.疑：Do we have lunch at 12 oclock?No,we dont.（2）She has three lessons on Monday.否：She doesnt have three lessons on Monday.疑：Does she have three lessons on Monday?Yes,she does.2.do/does的用法：do/does可作可作助动
10、词(无意义)，也可作行为动词“做；干”。e.g I do my homework after school.(变为否定句和一般疑问句）变为否定句和一般疑问句）I dont do my homework after schook.Do you do your homework after school?一般现在时（总结）1.肯：主语肯：主语+V原原/V-s+其他成份其他成份.e.g I like football.He likes basketball.2.否：主语否：主语+dont/doesnt+V原原+其他成份其他成份.e.g I dont like football.He doesnt l
11、ike basketball.3.一般疑问句：一般疑问句：Do/Does+主语主语+V原原+其他成份？其他成份？Yes,主语主语+do/does.No,主语主语+dont/doesnt.e.g Do you like playing football?Yes,I do./No,I dont.Does she go to school at 8 oclock?Yes,she does./No,she doesnt.4.特殊疑问句：特殊疑问词+一般疑问句 e.g When do you go to bed every day?Where does she come from?温馨提示：(1)助动词助动词do/does/dont/doesnt+动词原形动词原形(2)have/has/do/does作助动词时才能在其后加作助动词时才能在其后加not或将其提至句首，但作行为动词时却或将其提至句首，但作行为动词时却不能这样。不能这样。
