be (am is are) - was were - been, beat - beat - beaten, become - became - become, come - came - come, run - ran - run

Exceptions

由
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更像是这样

Verb to be - am, is, are
Verb to be - am, is, are
由
打地鼠
To be - am, is, are
To be - am, is, are
由
随堂测验
Have - has - am - is - are
Have - has - am - is - are
由
随堂测验
is - are - was - were
is - are - was - were
由
随堂测验
To be - am, is, are
To be - am, is, are
由
随堂测验
To be - am, is, are +, -
To be - am, is, are +, -
由
随堂测验
am/ is/ are/ was/ were (+/-)
am/ is/ are/ was/ were (+/-)
由
开箱游戏
am, is, are - was, were
am, is, are - was, were
由
按组分配

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