nullThe Present Perfect TenseThe Present Perfect Tense现在完成时 现在完成时现在完成时
1.过去发生的动作对现在造成的影响或结果。2.过去已经开始，持续到现在的动作或状态动词构成：have/has+v过去分词have breakfastI have just had my breakfast.(现在我不饿)I’m not hungry nowmoved here
in 2000I still live hereI have lived here for three years.I have lived here since 2000/three years ago.null
现在完成时动词构成
have /has+v 过去分词(及物动词)
助动词否定haven’t
hasn’t疑问Have you……?
Has he……?按要求进行句型转换按要求进行句型转换He has already finished his homework.(一般问句，并作肯定、否定回答)
I have never been to Beijing before.(一般问句)
They have learned around five units.(提问)Has he finished his homework yet ?Yes, he has.No, he hasn’t. /Not yet.Have you ever been to Beijing before?What have they done?null1. 我的哥哥是 2002 年参的军。My brother joined the army in 2002.He has been in the army for 5 years.
He has been a soldier since 5 years ago.2. 他参军已经 5 年了。有些动词不能和for, since, how long 等连用有些动词不能和for, since, how long 等连用nullShe has bought the computer for two years.hadbuyhave/has had How long have you come to the United States？ been income tohave/has been in nullAnn has gone to China since three months ago.been innullI have got to Paris for one week .been ingot tohave/has been innullMy brother has joined the army for five years. been inbeen a soldier join have/has been inhave/has been a soldier nullI have left Shanghai for 3 days. been away from Shanghai leave have/has been away nullI have borrowed the dictionary since 3 days ago . kept borrow have/has kept nullThe film has begun for 10 minutes. been on begin have/has been on nullThe concert has finished for half an hour. been over finish have/has been over nullHis dog has died for two years . been dead die have/has been dead nullShe has married for six years . been married marry have/has been married 这本书我已经借了三星期了。这本书我已经借了三星期了。一般过去
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关于同志近三年现实表现材料材料类招标技术评分表图表与交易pdf视力表打印pdf用图表说话 pdf
达：
I borrowed the book three weeks ago.
用现在完成时态表达(用延续性动词)
I have kept the book for three weeks /since three weeks ago.
用it is …since –从句(用终止性动词的过去式)
It is three weeks since I borrowed the book.他到北京已经有三天了。他到北京已经有三天了。He arrived in Beijing three days ago.
He has been in Beijing for three days /since three days ago.
It is three days since he arrived in Beijing.Li Ming bought the e-dictionary for three weeks.Li Ming bought the e-dictionary for three weeks.Li Ming bought the e-dictionary three weeks ago.
Li Ming has had the e-dictionary for three weeks.
Li Ming has had the e-dictionary since three weeks ago.
It is three weeks since Li Ming bought the e-dictionary.
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