I (s ) a boy crying in the street and helped him find his mother.

问题描述:

I (s ) a boy crying in the street and helped him find his mother.

答案是saw

我看见一个男孩在街上哭然后帮助他找妈妈
纯人工

答案是 saw 看见( 是SEE的过去时,与HELPED 时态一致)
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