1.不规则变化:
eat-atemeet-met
catch-caught sleep-slept
buy-boughtdrink-drank
keep-kept hold-held
fly-flew swim-swam
2.一般直接加ed:
10个动词过去式求高手给解答
1.不规则变化:
eat-atemeet-met
catch-caught sleep-slept
buy-boughtdrink-drank
keep-kept hold-held
fly-flew swim-swam
2.一般直接加ed: