英语动词不规则变化时态是中学阶段的重点，也是难点。而与其息息相关的动词（尤其是不规则动词）的过去式、过去分词的变化散乱难记，令人头疼。可仔细琢磨就不难发现它们的变化有一定的规律可循。一、A-A-A 型。即原形、过去式和过去分词三者都相同（9 个）cost-cost-costcut-cut-cuthit-hit-hithurt-hurt-hurtlet-let-letput-put-putread-read-readset-set-setshut-shut-shut二、A-B-B 型。即过去式和过去分词相同（共 41 个）1•过去式和过去分词都含有-ought（3 个）bring-brought-broughtbuy-bought-boughtthink-thought-thought2•词尾有-ild，-end 时，只需把 d 变为 t（4 个）build-built-builtlend-lent-lentsend-sent-sentspend-spent-spent3•过去式、过去分词都含有-aught（2 个）catch-caught-caughtteach-taught-taught4•把-eep 变为-ept（3个）keep-kept-keptsleep-slept-sleptsweep-swept-swept5•把-ell 变为-old（2 个）tell-told-toldsell-sold-sold6•过去式、过去分词都含有-elt 或-ilt（4 个）smell-smelt-smeltspell-spelt-speltfeel-felt-feltspill-spilt-spilt7•过去式、过去分词都在原形词尾+t（3 个）learn-learnt-learntmean-meant-meantspoil-spoilt-spoilt8•过去式、过去分词词尾都是-d（4 个）say-said-saidpay-paid-paidlay-laid-laidhear-heard-heard9.改变元音字母（11 个）meet-met-metget-got-gotsit-sat-satfind-found-foundhold-held-heldspit-spat-spatshine-shone-shonewin-won-wonhang-hung-hungdig-dug-duglose-lost-lost10.改变辅音字母（1 个）make-made-made11.改变元、辅音字母（4 个）leave-left-leftstand-stood-stoodhave/has-had-hadunderstand-understood-understood三、A-B-C 型。即原形，过去式和过去分词都不相同（共 35 个）1.i-a-u 变化（6 个）begin-began-begundrink-drank-drunksing-sang-sungring-rang-rungswim-swan-swumsink-sank-sunk2•词尾为-ow,-aw 时，过去式将其变为-ew,过去分词在其原形后+n（5 个）blow-blew-blowndraw-drew-drawngrow-grew-grownknow-knew-knownthrow-threw-thrown3•词尾为“i+辅音（1 个）+e”，过去式将 i 变为 o,过去分词多在原形后+n，若那个辅音字母为 d 或 t，须双写 d 或 t 再+n（4 个）drive-drove-drivenwrite-wrote-writtenride-rode-riddenrise-rose-risen4•过去分词在过去式后+(e)n(5 个)brea...
