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1、现在完成时-动词变化规律 规则动词的过去式变化如下：一般情况下，动词词尾加-ed，如：worked played wanted acted 以不发音的-e 结尾动词，动词词尾加-d，如：lived moved decided declined hoped judged raised wiped 以辅音字母+y 结尾的动词，把-y 变为-i 再加-ed，如：studied tried copied justified cried carried embodied emptied 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：stopped begged fretted d
2、ragged dropped planned dotted dripped 注：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 动词过去式,过去分词不规则变化 AB 型 can-could shall-should will-would may-might AAA 型 costcost-cost cutcut-cut hithit-hit 0 hurthurt-hurt letlet-let mustmust-must putput-put setset-set shutshut-sh
3、ut readread-read ABA 型 becomebecame-become comecame-come runran-run ABB 型 bring brought-brought buybought-bought thinkthought-thought catchcaught-caught teachtaught-taught buildbuilt-built lendlent-lent sendsent-sent spendspent-spent digdug-dug feelfelt-felt keepkept-kept sleepslept-slept sweepswept
4、-swept leaveleft-left smellsmeltsmelt paypaid-paid saysaid-said sellsold-sold telltold-told sitsat-sat standstood-stood learnlearnt-learnt winwon-won havehad-had makemade-made hearheard-heard findfound-found holdheld-held ABC 型 beginbegan-begun drinkdrank-drunk singsang-sung swimswam-swum flyflew-flown growgrew-grown knowknew-known throwthrew-thrown drawdrew-drawn forgetforgot-forgotten speakspoke-spoken drivedrove-driven eatate-eaten givegave-given riderode-ridden taketook-taken writewrote-written am,iswas-been arewere-been dodid-done gowent-gone seesaw-seen wearwore-worn