he should cut his hair.(改为被动语态)

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he should cut his hair.(改为被动语态)
he should cut his hair.(改为被动语态)

he should cut his hair.(改为被动语态)
He should have his hair cut.因为他自己不能剪自己的头发,其中有个第三者,用have sth done用法.“ 主语+have+宾语+过去分词”
在“have sth done”结构中,have 有“请,让,使”的意思,由过去分词充当宾语补足语.
类似用法,如:
I want to have my bike repaired.
我想把我的自行车拿去修理.

His hair should be cut by him
情态动词的被动语态,在情态动词后+be+动词的过去分词

His hair should be cut.
主动句这样讲更好:He should have his hair cut.

His hair should be cut by him

His hair should be cut by him