动词过去式变化规则及其读音规则涟江为区内地表水的主要排水通道，隧道设计标高高于最低排水基准面，隧道区山脊内沟谷多为季节性冲沟，主要由大气降水补给，水量小，受季节影响明显，地表水不发育，地表水对隧道施工及运营无影响。71、一般情况下，动词词尾加 -ed ，如： work -worked play-played wanted-wanted act-acted 2、以不发音的 -e 结尾动词，动词词尾加 -d，如： live-lived move-moved taste-tasted hope-hoped 3、以辅音字母 + y结尾的动词，把-y变为-i 再加-ed，如： study-studied copy-copied cry-cried carry-carried 4、以一个辅音字母结尾的重读闭音节动词，双写词尾辅音字母，再加 -ed，如： stop -stopped 5、不规则动词的过去式变化规律性不强，须多加记忆。 go went make made get got buy - bought come - came fly-flew 不规则动词的过去式的构成 1把动词原形中的i改为a，变成过去式。如： beginbegan，drinkdrank，givegave，ringrang，singsang，sitsat，swimswam 2把重读开音节中的i改为o，变成过去式。如： drivedrove，riderode，writewrote 3改动词原形中的aw ow为ew，变成过去式。如： drawdrew，growgrew，knowknew，throwthrew（动词show除外，showshowed） 4动词原形中的e改为o，变成过去式。如： getgot，forgetforgot 5动词原形中的ee改为e，变成过去式。如： feedfed，meetmet 6动词原形中的eep改为ept，变成过去式。如： keepkept，sleepslept，sweepswept 7动词原形中的eak改为oke，变成过去式。如： breakbroke，speakspoke 8动词原形中的ell改为old，变成过去式。如： sellsold，telltold 9动词原形中的an改为oo，变成过去式。如： standstood，understandunderstood 10以ought和aught结尾，且读音是 :t的过去式。如： bringbrought，buy bought，thinkthought，catchcaught，teachtaught 11以ould结尾且读音为ud的情态动词过去式。如： cancould，shallshould，willwould 12把动词原形中的o改为a，变成过去式。如： comecame，becomebecame 13在动词原形后加d或t变成过去式，并且发生音变。如： hearhi heardh :d， sayseisaidsed，meanmi:nmeantment 14动词的过去式与动词原形一样。如： letlet，mustmust，putput，readreadred 15不符合上述规律的动词过去式。如： am，iswas，arewere，buildbuilt，dodid，eatate，fallfell，feelfelt，findfound，flyflew，gowent，have has had，holdheld，leaveleft，makemade，maymight，runran，seesaw，taketook 过去式“-ed”的发音规则 （1）动词词尾为“t，d”时，发/ id /音， want wanted （要）need needed （需要） （2）动词词尾为清辅音时，发/ t / 音。 help helped （帮助）laugh laughed （笑）look looked （看） kiss kissed （吻）wash washed （洗） watch watched （注视） （3）动词词尾为t，d以外之浊辅音或元音时，发/ d /音。 call called （叫）staystayed （停留）crycried （哭）drieddroppedwerewaspickedbuyDiddidntWaswas.haveDidNo,I didntWereNo,there werent.WasNo,there wasnt.boughtwentleftheardcaughtsentMy mother didnt buy me a new dress yesterday.Did your mother buy you a new dress yesterday?Dick didnt send me an e-mail last night.Did Dick send you an e-mail last night?The fisherman didnt catch many fish last week.Did the fisherman catch many fish last week?We didnt hear about the news this morning. Did you hear about the news this morning?Father didnt leave home an hour ago.Did father leave home an hour ago?Last night my sister and I didnt go to cinema.Did your sister and you go to cinema last night?Yes,she had to get up early last Wednesday.Yes,had to visit Lindas grandmother.No,she didnt had to water the plant.She got the money from the bank.She bought some food and drink.Yes,she was tired at the end of the day.