怎么查英语单词的过去式

我儿子的作业经常要查英语单词的过去式,可是我又不会,也找不到在那里可以查到,请那位高手帮忙告诉我一下,谢谢...

am/is-was
are-were
bear-bore
do-did
can-could
meet-met
see-saw
go-went
get got
eat-ate
fell-felt
这些是英语单词的过去式的不规则变化,还有很多,初二英语书第116页就有
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第1个回答  2008-11-18
在辞海中找到英语单词的原形,就可以找到你想要的啦!
第2个回答  2008-11-19
在英汉词典中查动词原形,如果过去时和过去分词是特殊的,词典中会有说明。没有特别注明就直接在动词原形后加ed。
第3个回答  2008-11-23
英语双击手册
第4个回答  2011-10-04
规则动词的过去式变化如下:   
(1)一般情况下,动词词尾加 ed ,
如:   work—worked; play—played;want— wanted; act—acted   
(2)以不发音的 e 结尾动词,动词词尾加 d,
如:   live—lived; move—moved; decide—decided; decline—declined; hope—hoped;   
(3)以辅音字母 + y结尾的动词,把y变为i 再加ed,
如:   studied tried copied justified cried carried embodied emptied   
(4)以一个辅音字母结尾的重读闭音节动词,双写词尾辅音字母,再加 ed,
如:   stopped begged fretted dragged dropped planned dotted dripped   
(5)注:不规则动词的过去式变化规律性不强,须多加记忆。   
go - went,
make - made,
get - got ,
buy - bought ,
come - came ,
fly-flew ,
is/am-was,
are-were ,
see-saw ,
bring-brought,
do-did,
teach-taught,
think-thought,
say-said,
sit-sat.
read-read,
spend-spent,
eat-ate,
give-gave,
sit-sat,
tell-told,
write-wrote,
feel-felt,
find-found,
hear-heard,
know-knew,   
put-put,
grow-grew,
take-took,
catch-caught,
come-came,
become-became,
swim-swam,
sweep—swept,
sing—sang,
draw—drew,   

以上的(1)至(4)条中的发音均有改变,具体分别有/d/ /t/ /id/。   
而不规则动词的过去式的发音则略有不同,但是有些还是按照一定规律变化的。如以上的:make - made,get - got ,buy - bought ,come - came ,fly-flew ,bring-brought,teach-taught, think-thought, say-said,sit-sat. read-read, spend-spent,give-gave,tell-told,write-wrote,feel-felt,find-found,hear-heard,know-knew,put-put,grow-grew,take-took,catch-caught,come-came,become-became,swim-swam,sweep—swept,sing—sang,draw—drew。