特殊说明：行为动词一般过去时不需考虑人称问题。
一般过去时的提示标志：yesterday，last year，a moment ago，just now，in 1965...
1、行为动词一般过去时的陈述句，一般在行为动词结尾加ed（特殊的双写最后一个字母加ed ，或将y改成i加ed，或不定式）
动词过去式的构成
一般的动词结尾加ed ask
help
play asked
helped
played
结尾是e的词，只要加d like
dance
love liked
danced
loved
以辅音字母结尾的重读闭音节词，先双写最后一个辅音字母，再加ed stop
stopped
以辅音字母加 y结尾的动词，先把y变i，再加ed study
carry studied
carried
不规则动词：
am（is）——was are——were come——came do——didget——got go——went have——had make——made
run——ran say——said see——saw tell——told
take——took
举例：
I
You visited the zoo last sunday.
He（She）
It played a balloon.
We
You visited the zoo last sunday.
They
They played a balloon.
2、借助于did和 not 将行为动词构成的一般过去时的陈述句改为否定句。需注意的是改后的否定句要用动词原形。
I
You didn't visit the zoo last sunday.
He（She）
It didn't play a balloon.
We
You didn't visit the zoo last sunday.
They