英语中的常用过去式单词（20个以上）、和加er的用法

现在时 过去时
have had
come came
become became
eat ate
forget forgot
get got
bear bore
is was
beat beat
build built
cost cost
lay laid
lie lay
go went
leave left
keep kept
lose lost
pay paid
run ran
send sent
shoot shot
单音节词及少数双音节词都在后面加词尾-er的方式构成比较级；
long longer simple simpler
以-ow,-er,-te等结尾的双音节词，也可用加词尾的方法构成比较级
narrow narrower clever cleverer
以"辅音+y"结尾的词，变y为i,再加词尾。
pretty prettier happy happier
busy busier

polite politer common commoner
quiet quiter high higher
warm warmer cold colder
brave braver small smaller
old older low lower
hard harder

以一个辅音字母结尾的词，将该辅音字母双写再加词尾：
hot hotter big bigger

现在时 过去时
have had
come came
become became
eat ate
forget forgot
get got
bear bore
is was
beat beat
bui