动词不规则变化

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。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-shutA-B-B型。即过去式和过去分词相同（共41个）过去式和过去分词都含有-ought（3个）bring-brought-broughtbuy-bought-boughtthink-thought-thought词尾有-ild，-end时，只需把d变为t（4个）build-built-builtlend-lent-lentsend-sent-sentspend-spent-spent过去式、过去分词都含有-aught（2个）catch-caught-caughtteach-taught-taught把-eep变为-ept（3个）keep-kept-keptsleep-slept-sleptsweep-swept-swept把-ell变为-old（2个）tell-told-toldsell-sold-sold过去式、过去分词都含有-elt或-ilt（4个）smell-smelt-smeltspell-spelt-speltfeel-felt-feltspill-spilt-spilt过去式、过去分词都在原形词尾+t（3个）learn-learnt-learntmean-meant-meantspoil-spoilt-spoilt过去式、过去分词词尾都是-d（4个）过去分词在过去式后+（e）n（5个）break-broke-brokenchoose-chose-chosenfreeze-froze-frozenspeak-spoke-spokenwake-woke-woken过去分词由过去式+ten构成（1个）forget-forgot-forgotten过去分词由原形+（e）n构成（6个）be-was/were-beeneat-ate-eatenfall-fell-fallengive-gave-givensee-saw-seenhide-hid-hidden词尾为-ake时，过去式将其变为-ook，过去分词在原形后+n（2个）take-took-takenmistake-mistook-mistaken原形。过去式和过去分词都不相同（6个）do-did-donefly-flew-flowngo-went-gonelie-lay-lainshow-showed-shownwear-wore-wornA-A-B型，即过去式和原形相同（1个）beat-beat-beatenA-B-A型，即过去分词和原形相同（3个）come-came-comebecome-became-becomerun-ran-