现在完成时态的用法

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1、现在完成时态的用法1．表示过去发生的动作对现在的影响和结果。常和already,yet,ever,never,just等连用。already用于肯定句，一般放在句末或助动词have/has后，而yet多用于否定句或一般疑问句的句末。句子的谓语动词可以是延续或者是非延续性。Ihavealreadyfinishedmyhomework.Hehasn’treturnedthebooktomeyet.2.表示过去发生的动作一直延续到现在，而且可能还会延续下去，此时常和这些时间状语连用：（1）since+过去的时

2、间点/过去式的从句，如sincethreeyearsago,since2001,sincehecamehere.(2)for+时间段如fortwodays,forafewyears.(3)用于现在完成时的时间状语还有thesedays,sofar,uptonow,bynow,untilnow,inthelast/pastthreeyears等。在表达这层意思的时候，句子的谓语动词必须是延续性动词。常见的非延续动词和延续性动词的转换：非延续延续非延续延续borrowkeepbuyhaveleavebeaw

3、ay(from)comeherebehereclosebeclosedopenbeopendiebedeadbecomebejoinbein/amemberofgotherebetherecome/go/getbackbebackmakefriendswithbefriendswithfinish/endbeoverbegin/startbeongettoknowknowwakebeawakegetupbeupcatchacoldhaveacoldturnon/offbeon/offputonwear/

4、have…onfallill/asleepbeill/asleepmovetobein但是，在否定句中，谓语动词仍然可用非延续动词。如Ihaven’tboughtclothesforayear.33.have/hasbeento,have/hasbeenin和have/hasgoneto的区别。（1）have/hasbeento指“到过某地”,说话时此人已经不在那里了。IhavebeentoJapantwice.HowmanytimeshashebeentoBeijing?(2)have/hasbeen

5、in表延续的状态，意思是“呆在某地”说话时此人还在那里。HehasbeeninChinafortenyears.Howlonghaveyoubeeninthisschool?(3)have/hasgoneto表示“去了某地”，说话时此人在那里，或是在去那里的路上。这个用法的主语只能是第三人称。MymotherhasgonetotheUSA,she’snotathome.4.现在完成时态不能和表示过去的时间状语连用，也不能用when提问。I.用括号里所给单词的适当形式填空。1.I___________(k

6、now)hersinceshecamehere.2.LiPing__________(be)inthearmyforthreeyears.3.John_________ever_________(be)totheSummerPalaceseveraltimes.4.--________youever________(be)toNanjing?--Yes.I________(go)therein1999.I________(see)manykindsofanimalsthere.5.–WhereisMis

7、sGreen?--She________(go)tothelibrary.Shewantstoborrowsomebooks.6.Mygrandfather_________(plant)thosetrees.He_______(do)itthedaybeforeyesterday.7.I_________already________(see)thisfilm.I_________(see)itwithmybestfriendslastSunday.8.I_________(lose)mypenyes

8、terdayand___________(notfind)ityet.9.We__________(learn)Englishformorethantwoyears.10.We_________(come)tothisschoollastSeptember.We________(study)inthisschoolforoneyear.II.根据汉语提示完成句子。1.He_________thebookfivedaysago.He_____