询问语法题 动词填空The books the author _____(print)were sold out last week.答案是had had printed为什么是两个had?

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询问语法题 动词填空The books the author _____(print)were sold out last week.答案是had had printed为什么是两个had?
询问语法题 动词填空
The books the author _____(print)were sold out last week.
答案是had had printed
为什么是两个had?

询问语法题 动词填空The books the author _____(print)were sold out last week.答案是had had printed为什么是两个had?
过去完成时+被动语态,其中还有定语重句
the books that the author had had printed were sold out last week.
其中一个had 是have sth done句型,had the books ptinted,例如i have my hair cut

had printed
要用过去完成时态

printed

had had printed 前一个had是过去时的,后一个had是过去完成时的被语态
前一个had 是have sth done句型,had the books ptinted