初中英语现在完成时课件精讲.ppt

现在完成时,by mike chen,a: would you like to visit the great wall? b: thank you. but i have visited it. and daming has visited it, too.,a: would you like to visit the great wall? b: thank you. but i it. and daming it, too.,a: would you like to watch the movie with me? b: id like to, but i have watched it. and tony has watched it, too.,a: would you like to watch the movie with me? b: id like to, but i it. and tony it, too.,a: tom, why dont you do your homework? b: i have finished my homework. and my sister has finished her homework ,too.,a: tom, why dont you do your homework? b: i my homework. and my sister her homework ,too.,can i borrow your story book? sorry, thats sams .i have returned it to sam.,can i borrow your story book? sorry, thats sams .i it to sam.,a: would you like to visit the great wall? b: thank you. but i have visited it. and daming has visited it, too.,a: tom, why dont you do your homework? b: i have finished my homework. and my sister has finished her homework ,too.,1.现在完成时是怎样构成的？,主语 have/has +过去分词。,1. 过去分词是怎么回事？,过去分词(pp)其变化方法和动词过去式基本相同。 即：在动词后+ed live-lived -lived 有一部分动词的过去式和过去分词形式不同，需要记牢。,write-wrote-written,go-went-gone,see-saw-seen,give-gave-given,2. 什么情况下使用has ?,主语是第三人称单数时， 使用has.,he has finished his homework. she has gone home. daming has seen the film. my father has had dinner.,其他情况下使用have,i have you have we have they have,3.have或 has 在结构中有意思吗？,在现在完成时态中， have或 has 是助动词，无意义。 do you like music? 但是，我们可以给他虚拟一个意思“已经”。 i have finished my homework. i have visited the great wall.,4. 现在完成时态的句子在翻译成汉语时 有什么特征？,“已经” “过”,5.缩写形式,i have you have we have they have he has she has ,=ive =youve =weve =theyve =hes =shes,i have finished my homework. ive finished my homework. they have come back. theyve come back. he has finished his homework. hes finished his homework. she has gone home. shes gone home,1.现在完成时是怎样构成的？,2. 什么情况下使用has ?,3.have或 has 在结构中有意思吗？,4. 现在完成时态的句子在翻译成 汉语时有什么特征？,小结,5.缩写形式,a: i have visited the great wall. have you visited the great wall? b: yes, i have. no, i havent. no, i havent visited the great wall.,he has finished his homework. has he finished his homework? yes, he has./ no, he hasnt,否定句和一般疑问句的形式,group work,讨论：现在完成时态的 否定句和一般疑问句是怎样构成的？,i clean my room. they arrive in beijing. she visit china. betty read the book. we water the flowers.,pair work,用现在完成时表达下列句子,现在完成时和一般过去时的区别,i visited the park last sunday. i have visited the park. he finished his homework ten minutes ago. he has finished his homework.,一般过去时既强调发生的动作 也强调动作的发生时间。 现在完成时仅强调有过这样的经历 或已经完成某事，但