need过去式

need过去式

-电位器式传感器

2023年2月15日发(作者：点的投影)

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动词过去式变化规则

一、规则变化

1、一般情况下，动词词尾加-ed,如：work—workedplay—

playedwant—wantedask—askedtalk—talked

2、以不发音的-e结尾动词，动词词尾加-d,如：live—livedmove—

movedtaste—tasted

3、以“辅音字母+y”结尾的动词，把y改成i,加—ed,如：study—

studiestry—triedcopy—copiedcarry—carried

4、重读闭音节动词，双写词尾辅音字母，再加—ed,如：stop—stopped

二、不规则变化

sit—satsing—sangdrink—drankgive—gavering—rangswim—swam

write—wroteride—rodedrive—drove

draw—drewgrow—grewknow—knew

get—gotforget—forgot

sweep—sweptkeep—keptsleep—slept

speak—spokebreak—broke

tell—toldsell—sold

buy—boughtthink—thoughtcatch—caughtteach—taughtbuild—built

can—couldshall—shouldwill—would

过去式与动词原形一样：let—letmust—mustput—putread—read

三、动词过去式构成读音

1、清辅音后读清辅音[t]（清读清）如：jumplike

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2、浊辅音后读浊辅音[d]（浊读浊）如：listenpull

3、元音后面读浊辅音[d]（元音后面读浊音）如：waterplay

4、[t][d]后面读[id]wantneed