A let B do sth变为被动语态,是B be let do sth还是B be let to do sth

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A let B do sth变为被动语态,是B be let do sth还是B be let to do sth

应该是:B be let to do sth
被动语态时,使役动词加to
如 I let him come in - - He was let to come in by me.

都不是 应该是B be asked by A to do sth

a be let to do sb be made to do 使役动词改被动 宾补to不能省

应该是B be let to do sth by A