1、短暂性动词延续性动词和现在完成时短暂性动词，延续性动词和现在完成时延续性动词是指动作发生后还可以延续一段时间或者相当长的一段时间。如：live,work, study, learn, sleep等，延续性动词可以和表示一段的时间状语连用。短暂性动词是指动作一旦发生就立即结束。它不能和一段时间连用。这类动词有：go,come, arrive, leave, begin, start, join, marry等；在否定句中，短暂性动词可以和表示一段时间的状语连用。We havent heard from Jane for a long time.短暂性动词的肯定式不能与表示一段时间的for或sin
2、ce或how long等状语连用。值得注意的是，表示一段时间的状语除了“for+一段时间”外，还有since+n./从句（时间点），since+时间段+ago，疑问词how long，in the past+时间段，all these+时间段，fromto（时间点）以及till/until+n./句子等等。例如：.I have received his letter for three days（） I have received his letter.（）How long did she leave .（） How long has she been away ()如果短暂性动词与表示一段时
3、间的时间状语连用，必须将短暂性动词改为延续性动词。现归纳总结一下由非延续性动词到延续性动词的转换：arrivebe here除了用上面的转化形式之外，还可以用其他的表达形式：A. It is 或者 It has been+时间+since（动词用过去式），B.主语+谓语（过去时）+时间+ago。例如：Its five days since I received his letter. His father died three years ago.看一个句子可以用以下几种说法：他离开上海已经3天了。He left Shanghai three days ago. He has been awa
4、y from Shanghai for three days/since three days agoIt is/has been three days since he left Shanghai.Three days has passed since he left Shanghai.几点注意事项:（1）have been(to)与have gone( to)的区别：have been(to)表示“去过某地（现在已经回来了）”，可用于各人称；have gone(to)表示“去某地了（说话时某人不在当地）”，可能在去的路上，可能已在某地，也可能在回来的路上，总之，人不在这里。常用第三人称作主
5、语。前者可与once,never, several times等连用，后者则不能。如：They have been to Beijing twice.他们去过北京两次。He has gone to Beijing他去北京了。注意比较 has gone to, has been to, has been in的意义：He has gone to Amercia.（他到美国去了。他不在这里）He has been to Amercia.（他去过美国。现已回来）He has been in Shanghai.（他在上海呆过。现在不在上海）He has been in shanghai for yea
6、rs.（他在上海多年。现在还在上海）（2）终止性动词现在完成时的否定式，已变成一种可以延续的状态，因此可以和表示一段时间的状语连用。如：I haven t left here since 1997.自从1997年以来，我一直没有离开过这儿。另外，动词的延续性与非延续性还体现在这两种句型中：延续性动词的肯定式+till/until 短暂性动词的否定式+till/ until请看例句：We waited until he came.I didnt go to bed until my father came back home last night.短暂性动词，延续性动词和现在完成时练习I. 句型
7、转换：1. Mr. Li began to teach English in this school in 1999.（同义句）Mr. Li _ _English in this school since 1999.2. The factory opened ten years ago.（同义句The factory _ _ _ for ten years.3. John left Beijing three years ago. （同义句）Three years _ _ _ John _ Beijing.John_ _ _ _ Beijing _ three years.4. His com
8、pany opened in 2003. （同义句His company _ _ _ since 2003.5. My father bought the car half a year ago. （同义句My father _ _ the car _ half a year.6. We got to know each other for about 15 years.（同义句We _ _ each other _ about 15 years.7. The film began ten minutes ago. （同义句The film _ _ _ for ten minutes.8. I
9、 borrowed this book two weeks ago. （同义句I _ _ this book for two weeks.9. My father came back the day before yesterday.My father has _ _ for two days. uncle bought the new car two months ago.My uncle has_ the new car _two months ago.II. 用have been和have gone填空。1. Mother isnt here. She _ to the barbers.
10、2. _ you ever _ abroad before4. Tom and Mary have just come in. They _ to a party.5. Tom and Mary arent here. They _ to a Party.6. My father _ to New York. He left this morning.12. The students _ to the cinema to see a film today. Now they are back.14. Mr. and Mrs. Smith _ to London now. They _ ther
11、e twice already.18. Miss Li _ never _ to China before.19. Where _ you _ The meeting has already begun.20. Where _ he _ I cant find him anywhere.选择题1. The bookshop _ for eight years. A has been open B has been opened C has opened D has open 2. I _ the club for 5 years so far. A. joined B. have joined
12、 C. have been in3. The factory _ since the February of 1988. A . has been open B. has opened C. was open D. opened4. Mary and Rose _friends since they met in 2000. A. have made B. have been C. made D. have become mustnt _ until he comes back. A. be away B. leave C. be left meeting _ for a week now.
13、A. has finished B. has ended C. has been over Gao _ this school for nearly 5 years. A. has been in B. has come to C. has taught _ a teacher for 4 years . A. has been B. has become C. was D. became9. I _ home for a week. A. have returned B. have been back C. returned10. How long _ he _ A. died B. has
14、, died C. has, been dead11. He _ at eight yesterday afternoon.A. slept B. was sleeping C. has sleep D. had slept _ the car for a week. A. bought B. has bought C. has had long _ you _ ill -Two weeks. A. did fall B. have, fell C. have, been 2000, he _ his hometown. A. has left B. has moved away C. has
15、 been away from lend you the book , but you can only _ it for 2 days. A. borrow B. keep C. take bus _ on the road for 2 hours so far. A. has stopped B. stopped C. has been you _ the jacket these days A. wearing B. putting on C. dressing D. on _ foe 2 hours. A. got up B. has got up C. has been up19.
16、Tom is ill in hospital. He _ a cold for several days. A. is B. catches C. has caught D. has had How long can I _ the book - Two weeks.A. borrow B. lend C. get D. keep 21.-Howlong_ you_thearmy-Foroneandahalfyears.A.did,joinB.have,beenin C.have,joined D.will,join22.Oh,Mrs,King.Yourdresslooksnice.Isitn
17、ewNo,I_itsincetwoyearsago.A.hadB.boughtC.havehadD.havebought23.Jackhas_foraweek.A.hadacold Bgotacold C.caughtacold24.“Howlonghaveyou_there” “Aboutsixyears.”A.comeB.goneC.leftD.worked25.Ourworkshopsincetwoyearsago.A.wasopenB.openedC.hasbeenopenD.hasopened26.Mygrandpa_forhalfayear.A.hasbeendeadB.diedC
18、.hasdiedD.wasdead27.-Whatanicebike!Howlongyou_it-Justtwoweeks.A.will;buyB.did;buyC.are;havingD.have;had28.Hehas_thewatchforayear.Abuy Bbought Chave Dhad29.I _thisbook fortwoweeks,Ihavetoreturnitnow.AborrowedBhaveborrowedCkeptDhavekept30.Herbrother_thePartysince1978.Ajoined Bhasjoined Chasbeenin Dwas
19、in.改错He has been to Beijing for over two yearsHe has joined the army since 2001I have borrowed the book for a weekHow long have you bought the bike My father has left for shanghai for two daysThe bag has been there three days agoLi Leis grandfather has died since four years ago He has finished his homework last night
