1、I've never heard of anyone doing that。 我从未听说有人做那种事。2、l have played the piano 。我已经弹过钢琴了。3、Have you had lunch yet? -Yes,I have。

   I've just had it。 你(已经)吃午饭了吗? 我刚刚吃过。(现在我不饿了) 4、He has taught here since 1981 。他自1981年就在这儿教书。(可能还要继续教) 5、I have't seen her for four years。

   我有四年没见到她了。6、I have been to Beijing twice。我去过北京二次。 7、We have already finished our homework。我们已完成作业了。8、They haven't finished their homework yet。

  他们还没有完成作业。 9、Have you ever been to the Great Wall?你曾经去过长城吗? 10、I have never been to the Great Wall。我从未去过长城。11、I have seen her before,but I can not remember where。

   我以前见过她,但记不起在哪里见过。 12、He has been there three times the last few days。 近几年他去过那里三次了。 13、Have you met him today?-No,I haven't。

   今天你见过他吗?我 没有。14、How many times have you been there this year? 今年你去过那里多少次? 15、He has been a soldier for three years。他参军三年了。

  16、His father has been dead for two years。他父亲去世二年了。17、The film has been on for ten minutes。电影已开始十分钟了。 18、We have studied English for three years。

   我们(开始)学英语已三年了。 19、I have lost my new book。 我把新书丢了。(现在还未找到)20、He hasn't finished his homework yet。 他至今没有完成他的作业。21、The teacher says she has made lots of trouble in her class。

   老师说她在他们班制造了很多麻烦。22、They have got 5 prizes by the end of this year。 截止到今年年末他们已经获得5个奖项。23、I have finished my homeworkes。 我完成了我的家庭作业。

  24、She has watered the flowers。 她已经浇了花。25、I have written the letter but I haven't posted it yet。 信我已经写好了,但还没有寄出。26、He has waited for her for two hours。

   他等她已经两个小时了。27、He has lived in Beijing for 8 years他在北京住了 8 年 。28、It has rained for five hours 雨已经下了5个小时了。29、I have reviewed two lessons this morning。

   今天上午我已经复习了两课。30、I have had my lunch。我吃过我的午餐。31、You heaven't had any change ye。 你没有看到任何变化。32、He has read some books。他读过了许多书。

  33、She has ate her snake。她吃过了她的零食。34、They have saw that film。他们看过了那场电影。。35、He has lived here since 1978。自从1978年以来,他一直住在这儿。

  现在完成时是由助动词 have(has) 动词的过去分词构成。助动词说明该谓语是属于现在时范围。它和主语的人称、数要保持一致。过去分词是主要的谓语动词,说明句子的意义。