1、1.现在完成时的构成现在完成时的构成 现在完成时的形式是“have (has)+过去分词”，表示继续、完了、结果和经验 等四种意思。 现在完成时的否定句是在 have(has)的后面加上 not，疑问句是将 have(has) 置于主语之前。 1 现在完成时的肯定句现在完成时的肯定句 句型： 主语(第一、二人称单、复数，第三人称复数)+have +过去分词 主语(第三人称单数)+has 例如： We have lived in Beijing. 我们一直住在北京。 He has lived in Beijing. 他一直住在北京。 过去分词有下列三种用法： 1.构成现在构成现在(过去过去)完成
2、时完成时 have(has)+过去分词 I have written the letter. 我写完这封信了。 2.被动语态：被动语态： be + 过去分词 He was looked after.他受到照顾。 3.用于形容词用于形容词 This is a broken chair. 这是一张坏的椅子。 2 现在完成时的否定句现在完成时的否定句 句型：主语+have(has)+not +过去分词. I have not seen the movie yet. 我还没看这部电影。 He hasnt been to Beijing since then. 从那时起，他就再也没来过北京。 注意 ha
3、vent =have not 读作hvnt hasnt =has not 读作hznt Weve =We have 读作wiv 3 现在完成时的疑问句现在完成时的疑问句 句型：一般疑问句：Have(Has)+主语+过去分词？ Have you finished the work？ 你已经做完这项工作了吗？ Yes，I have. 是的，我已经做完了。 No，I havent. 不，我还没有做完。 Has she arrived here？ 她已经到这儿了吗？ Yes，she has 是的，他已经到了。 No，she hasnt 不，她还没有到这儿。 特殊疑问句句型 特殊疑问词+have(has
4、)+主语+过去分词？ How many times have you been to the Great Wall？ 你去过长城几次？ 现在完成时的构成现在完成时的构成 练习题练习题 一、用括号中动词的适当形式填空 1He _ (wait) for an hour. 2I _ (not finish) the work yet. 3_ you _ (know) him since then ? 4I _ (hear) from my father recently. 5We _ (be) there many times in the past 3 years. 6The sun _ (ris
5、e) when we got there. 7They _ (finish)the work by the end of last month. 8How long you _ (stay) at home already 9I _ (not read) the book before. 10He _ just _ (do) it. 11My sister _ (walk) to school everyday last year. 12We _ (have) an exam. again sometime next week. 13By 1993, we _ (plant) 20,000 t
6、rees. 14Her sister _ (go) to Shanghai. She _ (leave) this morning. 15My friend Wang Hai often _ (swim) in the river. 16The writer _ (finish) several story-books since 1980. 17I asked my mother _ she _ (come) back soon. 18What _ you _ (do)when I called you ? 19Dont cry! Our teacher _ (go) over his le
7、ssons. 20He just _ (have) his breakfast. 21I believe that our volleyball team _ (be)back in a week. 22The famous scientist _ (reach) Beijing two days ago. 23Well go to visit the museum if it _ (not rain) tomorrow. 24I saw my friend when I _ (walk) in the street. 25Look, the boys _ (play) on the play
8、 ground. 26He _ (live) in his hometown since he left here. 27He _ (go) to see his grandfather last Sunday. 28When we got to the classroom, the class _ (begin). 【答案】 1has waited 2havent finished 3Have, known 4have heard 5have been 6had risen 7had finished 8have, stayed 9havent read 10has, done 11walked 12will have 13had planted 14has gone, left 15swims 16has finished 17if, would come 18were, doing 19is going 20has, had 21will be 22reached 23doesnt rain 24was walking / walked 25are playing 26has lived 27went 28had begun