现在完成时用法(5张)句型：（V-ed）e.g done语(p.p)（V-ed）+宾语. +have/has+not+动词的过去分词(p.p)（V-ed）+宾语. Have/Has+主语+动词的过去分词(p.p)（V-ed）+宾语. +一般疑问句（have/has+主语+过去分词（V-ed）+其他）定义：（1）强调动作是从过去持续到现在，并有可能继续持续下去。
（2）的时间点，即过去某一时间发生某一动作；现在完成时则没有，即不强调是哪个时间点发生的动作，而强调过去的动作对现在造成的影响和结果。
（3）在过去不确定的时间里发生的动作，但是结果对现在有影响。
但过去分词一定要选择准确。
1四点变化规则：现在完成时态-中小学教育资料(1)、一般动词，在词尾直接加“ ed ”。
work---worked---worked ,visit---visited---visited(2)、以“ e ”结尾的动词，只在词尾加“ d ”。
live---lived---lived , (3)、以“辅音字母+ y ”结尾的动词，将"y" 变为"i" ，再加“ ed ”。
study---studied---studied ,cry---cried---cried (4)、重读闭音节结尾，末尾只有一个辅音字母，先双写该辅音字母，再加“ ed ”。
stop---stopped---stopped , drop---dropped--dropped(read原形发音为/ri:d/,过去式和过去分词发音为/red/) ABB型①for+时段为…时间②since+过去一个时间点（译为：自从……以来）③since+时段+ago ④since+从句（过去时）●⑤It is+时段+since+从句（过去时）（buy,die,join,lose……）不能直接与for since 连用。
要改变动词come/arrive/reach/get to-----be in go out----be out finish----be over open----be open die----be dead Buy---have Fall ill---be ill Come back---be back Put on ---be on/wear Worry---be worried Catch a cold---have a cold ……………… ★1.have代替buy My brother has had(不能用has bought) this bike for almost four years. ★2、用keep或have 代替borrow I have kept(不能用have borrowed) the book for quite a few days. ★3、用be替代become How long has your sister been a teacher? ★4、用have a cold代替catch a cold Tom has had a cold since the day before yesterday. ★5、用wear代替puton b)用1、be+married代marry 2、be+ill代fall (get) ill 3、be+dead代die 4、be+asleep代fall (get) asleep 5、be+awake代wake/wake up 6、be+gone 代lose,die,sell,leave 7、be+open代open 8、be closed代close/shut 9、be+missing(gone,lost)代lose c)用“be+副词”代终止性动词1“be+on”代start,begin 2“be+up”代get up 3“be+back(to)”代return to,come back to,go back to 4“be here (there)”代come(arrive,reach,get) here或go (arrive,reach,get) there等等d)用“be+介词短语”代终止性动词 1.“be in/at +地点”代替go to /come to 2.用be in the army 代替jointhe army 3.“be in/at +地点”代替move to常用瞬间动词变延续性动词表：1. have arrived at/in sw. got to/reached sw. come/gone/moved to sw. have been in sw./at…相应的介词2. have come/gone back/returned have been back 3. have come/gone out have been out4. have become have been5. have closed / opened have been closed/opened6. have got up have been up；7. have died have been dead；8. have left sw. have been away from sw.9. have fallen asleep/got to sleep have been asleep；10. have finished/ended/completed have been over；11. have married have been married；12. have started/begun to do sth. have done sth. ；13. have begun have been on14. have borrowed/bought have kept/had 15. have lost haven’t had16. have put on have worn 17. have caught /get a cold have had a cold；18. have got to know have known19. have/has gone to have been in20. have joined/have taken part in the league/the Party/the armyhave been a member of/ have been in/have been the Party’s member/the league member/the soldier…1.现在完成时不能单独与准确时间连用，(如表示过去的时间状语）如yesterday(morning、afternoon),last(morning、afternoon)等，除非与for,since连用.2.现在完成时往往同表示不确定的过去时间状语连用,如already（肯定）, yet（否定，疑问）, just, before, recently,still, lately,never等: He has already obtained a scholarship. I haven't seen much of him recently (lately). We have seen that film before. Have they found the missing child yet ?3. 现在完成时常常与表示频度的时间状语连用,如often, sometimes, ever, never, twice, on several occasion等: Have you ever been to Beijing I have never heard Bunny say anything against her. I have used this pen only three times. It is still good. George has met that gentleman on several occasions.4. 现在完成时还往往可以同包括现在时间在内的时间状语连用,如now, up to these few days/weeks/months/years, this morning/week/month/year, just, today, up to present, so far等: Peter has written six papers so far. Man has now learned to release energy from the nucleus of the atom. There has been too much rain in San Francisco this year. The friendly relations and cooperation between our two countries have been enhanced in the past few years. Up to the present everything has been successful.5. 现在完成时还可以用来表示过去的一个时间到现在这段时间内重复发生的动作.We have had four texts this semester. 6.现在完成时的"完成用法"现在完成时的"完成用法"指的是动作发生在过去某一时刻并已结束，但该动作对现在产生了影响，与现在情况具有因果关系。
