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60。 ※smell smelt smeltsit sat sat sleep slept slept stand stood stood teach taught taught tell told told think thought thought understand understood understood meet met metABC型(原形、過(guò)去式和過(guò)去分詞各異):be was/were been break broke broken do did done draw drew drawndrink drank drunk drive drove driveneat ate eaten fall fell fallensing sang sung go went gone grow grew grown know knew knownlie lay lain ride rode riddenring rang rung see saw seen speak spoke spoken swim swam swumtake took taken throw threw thrownwake woke woken write wrote written forget forgot forgotten begin began begunABA型(原形與過(guò)去分詞同形):bee became bee e came e AAB型(原形與過(guò)去式同形):beat beat beaten 8 / 8