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1、now past I began to teach English 24years ago.=I have taught English for 24 years. I am teaching English now.=I have taught English since 24 years ago.我我 教了教了 英语英语24年了年了 .（含义：（含义：1.我在我在过去过去某个时间某个时间开始教开始教英语英语 2. 我我现在现在还在教英语。）还在教英语。）now past I began to study English 8years ago.I have studied English f
2、or 8 years. I am studying English now.I have studied English since 8 years ago.How long have you studied English?now past I moved to Dongguan in 2007.I have lived in Dongguan for 10 years. I am living in Dongguan now.I have lived in Dongguan since 2007.How long have you lived in Dongguan?I have live
3、d in Dongguan since I was born.Ask & answer:How long have you lived in Dongguan?I have lived in Dongguan for _.I have lived in Dongguan since _.I have studied English for _.I have studied English since _.How long have you studied English?Ask & answer:How long has he/she lived in Dongguan?He/She has
4、lived in Dongguan for_.He/She has lived in Dongguan since_.He/She has s tudied English for _.He/She has studied English since _.How long has he/she studied English?now past I began to teach English at this school fiveyears ago.I have taught English at this school for five years.用法用法2 2：表示过去开始发生，表示过去
5、开始发生，持续持续到现在的动作或到现在的动作或状态。状态。(谓语动词必须是谓语动词必须是“延续性延续性”)标志词标志词： for，since , how long, these years, so far, in the past/last years since + since + since +时间段时间段 + ago时间段时间段一般过去时句子一般过去时句子某年某年/月月/日日/时时刻刻_ last month_ a month_ 10 years_ I came here_ a long time_ 2 weeks ago_ she left _ 5 years ago_ 5 years
6、 _2 oclock_ 2 hours _ 15 years _I was born _ 1999since +for +sincesincesincesincesincesincesincesinceforforforforforforsince 与与 for：过去过去时间点时间点 1.Theyve known each other since_. A.1995 B. three years 2.Ive been interested in Chinese for_. A. last year B. one year 3. She has been a doctor for_. A. two
7、 years B. two years ago 4. Ive had a headache since_. A. I got up this morning B. five hours 5. Weve been here for_. A. one hour B. one oclock AABAB1.They _ (write) 15 songs so far.2. The population _ (grow) more slowly in the past ten years.3. He _ (be) in China these years. have written has grown
8、has been现在完成时标志词：现在完成时标志词：for，since , these years, so far, in the past/last years now past My grandpa died 8years ago.My grandpa _ for 8 years. He is dead now.My grandpa _since 8 years ago.has been deadhas been deadMy grandpa has died for 8 years.我爷爷去世我爷爷去世8年了。年了。（短暂性）（短暂性）now past I bought my bike
9、2years ago.I _ my bike for 2 years. I have my bike now.I _ my bike since 2 years ago.have hadhave hadI have bought my bike for 2 years.我买了我的单车两年了。我买了我的单车两年了。（短暂性）（短暂性）now past My father left here 2 weeks ago.My father _ for 2 weeks. He is away now.My father _ since 2 weeks ago.has been awayhas been
10、awayMy father has left for 2 weeks.我爸爸离开了两周了。我爸爸离开了两周了。（短暂性）（短暂性）now past My sister fell asleep 2hours ago.My sister _ for 2 hours. She is asleep now.My sister _since 2 hours ago.has been asleephas sleptMy sister has fallen asleep for 2 hours.我妹妹睡了两小时了。我妹妹睡了两小时了。（短暂性）（短暂性）a. 短暂性短暂性动词动词不能与不能与for、sinc
11、e等表示等表示时间段。时间段。 ，不能与，不能与for、since等表示一段时间的词连用。等表示一段时间的词连用。b.短暂短暂性动词性动词不能用于不能用于how long引导的疑问句中。引导的疑问句中。c.短暂短暂性动词性动词不能用于进行时。不能用于进行时。延续性动词延续性动词和和短暂性动词短暂性动词短暂性动词短暂性动词: go/come/begin/start/die/buy/borrow/sell/leave/arrive/receive/become等词语是瞬间动等词语是瞬间动词词,表示的动作不能延续表示的动作不能延续动作动作状态状态die be over leaveborrow arr
12、ive here begin/ start finish joinkeep be away be here be on(上演）上演） be in be deadbuyhave短暂短暂性性动词动词转换转换延续性延续性动词：动词：go to school be in the school动作动作状态状态die be over leaveborrow arrive begin/ start finish joinkeep be away be here be on(上演）上演） be in be deadbuyhavego to school be in the school短暂短暂性性动词动词转换
13、转换延续性延续性动词：动词：1. His father _ the Party since 1978 . joined . has joined . was in . has been in2.Do you know him well ? Sure .We _ friends since ten years ago . . were . have been . have become . have made3.How long have you _ here ? About two months . . been . gone . come . arrivedDBA短暂性动词短暂性动词延续性动词延续性动词短暂性动词短暂性动词延续性动词延续性动词短暂性动词短暂性动词延续性动词延续性动词短暂性动词短暂性动词短暂性动词短暂性动词短暂性动词短暂性动词4. Hurry up! The movie _ for ten minutes . . has begun . had begun . has been on . beganC短暂性动词短暂性动词延续性动词延续性动词5. His grandma _ for two years.A died B has been dead C was dead D has diedB延续性动词延续性动词短暂性动词短暂性动词