(1) 规则动词过去式的构成有四条规则：
① 一般在动词原形末尾直接加上-ed。 如：look-looked， watch-watched。
② 以不发音的字母e结尾的动词，加-d。 如：live-lived， like-liked。
③ 末尾只有一个辅音字母的重读闭音节，先双写这个辅音字母，再加-ed。
如：stop-stopped， shop-shopped。
④ 末尾是辅音字母+y结尾的动词，先变y为i，然后再加-ed。
如：study-studied， carry-carried。
(2) 不规则动词的过去式需特殊记忆。
不规则动词过去式表
动词 过去式
be (am\ is) was
are were
come came
go went
do (does) did
fly flew
draw drew
make made
sing sang
have (has) had
eat ate
drink drank
put put
let let
read read
can could
see saw
meet met
get got
forget forgot
take took
can could
may might
shall should
will would
know knew
begin began
bend bent
build built
spend spent
mean meant
learn learnt learned
buy bought
think thought
teach taught
catch caught
sleep slept
sweep swept
keep kept
speak spoke
ride rode
feel felt
leave left
give gave
run ran
ring rang
sit sat
swim swam
say said
stand stood
tell told
throw threw
win won
write wrote
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