since 和 for 的用法

since 和for 的用法(用于现在完成时)表示过去已经开始持续到现在的动作或状态常用的时间状语有：for, since, how long, so far, these days等。

1. since :a).since +时间点①年代②时刻数③一段时间+agob).现在完成时：主句(主语+have/has +延续性动词的过去分词)+ since +从句一般过去时c) It’s +时间段+since +短暂性动词的过去式d).时间段+has passed +since +短暂性动词的过去式for +一段时间练习：用since和for填空1) ______ two years 2) _______ two years ago 3) _______ last month4) ______ 1999 5) _______ yesterday 6) _______ 4 o’clock7) ______ 4 hours 8) _______ an hour ago 9) _______ we were children 10) _____ lunch time 11) ______ she left here12). He has lived in Nanjing ________ the year before last.13). I’ve known him __________ we were children.14). Our teacher has studied Japanese _________ three years.15). She has been away from the city ___________ about ten years.16). It’s about ten years __________ she left the city.2. for: for +一段时间= since +一段时间+ ago3. 与时间段连用时，短暂性动词应改为相应的延续性动词。

1) come/go to ------ be at /in 2)leave ----be away from 3)buy ----have4) borrow /lend -----keep 4)open ---be open 5)close---be closed6) die---be dead 7) start/begin ----be on8) join—--be in /be a member of /be a soldier 9) become –be10) fall asleep ---be asleep 11)catch a cold – have a cold12) have/has gone to → have been in 13) put on → wear14) finish/end → be over 15) marry → be married练习：.短暂性转换延续性1) His grandfather died two years ago .His grandfather has ____ ____ for two years._____two years _____ his grandfather ____.Two years ____ ____ ____ his grandfather _____.2) I became a teacher in 2000.I ________ __________ a teacher for _________ _________.3) The shop closed two hours ago.The shop ________ _________ _________ for _________ _________.4) The door opened at six in the morning.The door ________ ________ ________ for six hours.5)He left Fuzhou just now.He _______ ________ ________ _________ Fuzhou for five minutes.6)The film began two minutes ago.The film ____ ____ ____ for ____ ____.How time flies!7)They borrowed it last week.They _________ _________ it since __________ __________.8)I bought a pen two hours ago.I _________ _________ a pen for ________ __________.9)They married in 1990.They ________ _________ __________since _________.10)The meeting finished at six.The meeting ________ ______ ______ for six hours.11)My brother joined the army two years ago.My brother __________ __________ a ___________ for ___________ ___________.My brother ___________ ___________ in ____________ ___________ for two years.12)I put on my glasses three years ago.I __________ __________ my glasses for _________ _________.选择1. Three years ________since I ________ you last time.A. have passed; metB. has passed; metC. passed; have met2. He has been here _______ he left his hometown.A. sinceB. inC. for3. —He ________the English-Chinese dictionary for about twenty years，but it is still new．—What a careful man!A. has boughtB. has borrowedC. has had4. ---When did China _____ the WTO?---China _____ the WTO for several years.A. join; has been a member ofB. join; has joinedC. take part in; have been in5. How long have you _____ the book?A. boughtB. borrowedC. kept6. How time flies! Several years _______ since we started our middle school life. We will keep the pleasant experiences in our minds.A. have passedB. has passedC.will pass7. Mr Fan _____ this bike in 2005. He ______ it for 10 years.A.bought, has boughtB.has bought, has hadC. bought, has had8. He ___ in our school for 20 years and he ___ here in 1977.A. has taught; cameB. has taught; has comeC. taught; cameD. has teached; has came9.They are late. The film ___ for five minutes.A. has begunB. has startedC. has been onD. began10.We have been friends since _____.A. five yearsB.five years agoC. five years before11..He has lived there ___ 1992.A. sinceB. forC. after12.Mike _____ the bike for a month.A. has boughtB. has hadC. has borrowed13.He his home for ten yearsA. has leftB. left fromC. has been away from14.May ______ the book for two weeks.A. borrowedB. lentC. keptD. bought15.I _____ the job since 2002.A: have B: had C: have had16.He has been a student_____two years.A inB onC afterD for写出喜面动词的过去式和过去分词become beginbreak buycome dodrink driveeat fallfelt flyforget getgive gohear hidekeep knowlie leadleave lendlose riderise runsee sellshine singsit sleepspeak swimtake thinkthrow wakewin write。