He help his mother do housework.变过去式He help his mother do housework.怎么变过去式?
问题描述：
He help his mother do housework.变过去式
He help his mother do housework.怎么变过去式?
答
he helped his his mother do housework.
答
He helped his mother do housework
分析:help+动词原形
答
He helped his mother do housework.
答
He helped his mother did housework
答
He helped his mother do housework.
解析：help sb.do 是省to不定式,help后面的动词要跟原型,所以,过去时改为helped sb.do,不可以是help sb.did.
答
LS正解
He helped his mother do housework.