現(xiàn)在完成時動詞變化

1、現(xiàn)在完成時定義表示過去不確定的時間發(fā)生的動作，對現(xiàn)在有影響。表示過去發(fā)生并連續(xù)到現(xiàn)在的動作。規(guī)則動詞：規(guī)則動詞的過去分詞的構(gòu)成規(guī)則與規(guī)則動詞的過去式的構(gòu)成規(guī)則相同。四點變化規(guī)則：(1）、一般動詞，在詞尾直接加“ed”。work-worked-worked,visit-visited-visited(2）、以“e”結(jié)尾的動詞，只在詞尾加“d”。live-lived-lived,(3）、以“輔音字母+y”結(jié)尾的動詞，將y變?yōu)閕，再加“ed”。study-studied-studied,cry-cried-cried(4）、重讀閉音節(jié)結(jié)尾，尾端只有一個輔音字母，先雙寫該輔音字母，再加“ed”。sto

2、p-stopped-stopped,drop-dropped-dropped不規(guī)則動詞：ABC型原型過去式過去分詞原型過去式過去分詞beginbeganbegungivegavegivenbearboreborn,bornegowentgoneblowblewblownknowknewknownbreakbrokebrokengrowgrewgrownchoosechosechosenlielaylaindrawdrewdrawnrideroderiddendrivedrovedrivenriseroserisendo/doesdiddoneringrangrungflyflewflownsh

3、akeshookshakenforgiveforgaveforgivensingsangsungforgetforgotforgotten,forgotbewas/werebeenfreezefrozefrozensinksanksunkwritewrotewrittenswimswamswumtaketooktakenthrowthrewthrownwearworeworndrinkdrankdrunkseesawseenAB型原型過去式過去分詞原型過去式過去分詞cancouldwillwouldmaymightbewas/wereshallshouldAAA型原型過去式過去分詞burstb

4、urstburstcastcastcastcutcutcuthithithithurthurthurtcostcostcostAAB型原型過去式過去分詞beatbeatbeaten,beat特別情況readreadread(read原形發(fā)音為/ri:d/，過去式和過去分詞發(fā)音為/red/)ABB型原型過去式過去分詞bringbroughtbroughtbuyboughtboughtbuildbuiltbuiltburnburntburntcatchcaughtcaughtdigdugdugfeelfeltfeltfightfoughtfoughtfindfoundfoundfeedfedfedgetgotgothanghung,hangedhung,hangedhearheardheardholdh