第1个回答 2013-02-18
am/is-was
are-were
wash-washed
cook-cooked
eat-ate
have-had
walk-walked
see-saw
run-ran
can-could
fall-fell
be分为am,is,are,所以过去式不同本回答被提问者采纳
第2个回答 2013-02-18
been, washed, etc.
第3个回答 2013-02-18
was/were、cooked、ate、had、walked、saw、ran、could、fell
第4个回答 2013-02-18
be、was/were
wash、washed
cook、cooked
eat、ate
have、had
walk、walked
see、saw
run、run
can、could
fall、fell