1、010203现在完成时的定义现在完成时的定义动词变化规则动词变化规则常见的时间标志词常见的时间标志词PART 01现在完成时的定义现在完成时定义1、过去发生的动作对现在造成的影响。2、过去的动作或状态持续到现在并且已经完成或可能持续下去。3、现在完成时表示将来。is/are/amhavewatchestodayalready have hadhave watched一般现在时have been现在完成时主语+have/has+动词的过去分词+宾语(或者其他)is/am/are-have been 基本句法结构用现在完成时表达下列句子1.到目前为止，彼得已经写了六篇论文。2.他已把灯关了。3.我
2、把钢笔丢了。Peter has written six papers so far.He has turned the light off.I have lost my pen.1、否定句:主语+have/has not(havent/hasnt)+过去分词+宾语(或者其他).2、一般疑问句:Have/Has+主语+过去分词+宾语(或者其他)?肯定回答:Yes,I/we/you/they have.或Yes,she/he/it（三单)has.否定回答:No,I havent.或No,she/he hasnt.3、特殊疑问句:特殊疑问词+一般疑问句(have/has+主语+过去分词+其他)?其他
3、句法结构肯定句转换特殊疑问句步骤1.They have had a meal at a restaurant since they left school.Where have they had a meal at a restaurant since they left school?1.找 2.变4.加3.去What have they had a meal at a restaurant since they left school?do特殊疑问句特殊疑问句=特殊疑问词+一般疑问句whatwhowhenwhichwhywhat colorwhat timehowhow oldhow mu
4、chhow manyhow longhow oftenhow far代替事物、事情代替人代替时间代替事物，表选择代替原因代替颜色代替时间点代替状态代替年龄代替价格、钱代替数量代替时间长度代替次数代替距离长度俩大系列：what 系列 how系列 用现在完成时表达下列句子1.你隔多长时间见她一次?2.他们找到失踪的孩子了吗?3.我还没看完这本书。How often have you seen her again?Have they found the missing child yet?I havent already read this book.改写句子：就划线部分提问1.My sister
5、has bought this pair of shoes this month.2.He has eaten all the cakes before I get home.What have your sister bought this month?Who has eaten all the cakes before I get home?PART 02动词的变化规则Vo-Ved不规则变化规则变化+d/ed 情况 方法 示例1，一般情况下 直接+ed work-workedvisit-visited2，以不发音的e结尾+dlive-livedhope-hoped3,辅音字母+y结尾改y为
6、i+edstudy-studiedtry-tried4，以重读闭音节结尾，末尾只有一个辅音字母双写该辅音字母+edstop-stoppedplan-planned不规则变化动词原形过去式过去分词类型bewas/werebeenABC型bringbroughtbroughtAAA型cutcutcutAAA型dreamdreamed/dreamt dreamed/dreamtABB型drivedrovedrivenABC型becomebecamebecomeABA型PART 03常见的时间标志词常见的时间标志词时间标志词作用：帮助确定句子的时态，从而确定谓语动词的形式完成句子填空1,My sist
7、er _(go)to school every week.goes2,They _(go)to work on Mondays.goevery系列on+星期S现在完成时呢现在完成时的时间状语：1、already用在肯定句中(be动词、助动词、情态动词之后，实意动词之前)常与yet进行转换。否定句:I havent finished the work yet.表示之前发生的事情，放在句末。2、beforeI have already finished the work.我已经完成这项工作了。一般疑问句:Have you finished the work yet?I have been to t
8、his place before.我之前去过了这个地方。现在完成时的时间状语：3、yet放在否定句和一般疑问句句末。否定句:I havent finished the work yet.（2）since+一般过去时态的时间状语从句4、（1）since+时间点=for+时间段=since+时间段+agojust,before,recently,still,lately,never,ever,twice,on several occasions,in the past/weeks/months/years,till now.一般疑问句:Have you finished the work yet?
9、例如:He has been here since he joined the army。自从他参军以来,他一直在这儿。现在完成时的时间状语：5、just例句:I have just cleaned my room.我刚刚清理了我的房间。否定句:I havent cleaned my room.表示经常的或习惯性的动作，常与表示频率的时间状语连用。放在have/has后面，动词后面6、ever 一般疑问句:Have you cleaned your room yet?例句:Their debts have grown ever larger.他们的债务不断增加。表示刚刚做过的事情，放在have/has后面1，They _ (go)to the Beihu Park this year.have gone2，Since he started to work，he _(buy)a new car.has bought根据句意，完成下列句子3，Lucy _(have)some bread for breakfast before she went to school.has haveThank you for listening
