一般过去时的规则和不规则变化ppt课件.ppt

一般过去时的规则动词和不规则动词
旅10
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规则动词
：直接加-ed
如：watch——watched
help——helped
work——worked
：加-d
如：love——loved live——lived
arrive——arrived
2
：变y为i再加-ed

如：
study
——
studied
cry
——
cried
worry
——
worried
carry
——
carried
3
，需双写这个辅音再加-ed.
stop
___
stopped
shop
___
stopped
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规则动词过去式记忆口诀
过去式构成有规律
一般词尾加-ed
如词尾有个e，直接加-d就可
辅音字母y结尾，变y为i加-ed
辅音重闭结尾，双写之后加-ed
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不规则动词的过去式
（1）动词原形和过去式一样
let——let put——put
read——read cut——cut
cost——cost hurt——hurt
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（2）遇见i改为a

swim
sing
begin
sit
give
drink
swam
sang
began
sat
gave
drank
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（3）过去式以ought和aught结尾的单词
bring
buy
think
catch
teach
brought
bought
thought
caught
taught
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（4）中间去e末尾加t
feel
keep
sleep
felt
kept
slept
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（5）把i变成o
ride——rode
（6）ow/aw变成ew
know——knew grow——grew
（7）以d结尾的单词，把d改为t
build——built send——sent
spend——spent
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