英语【Visitors have been asked to keep the woods cle

Visitors have been asked to keep the woods clean and tidy

have been asked是现在完成时被动语态，
现在完成时的形式是 have/has +done.
现在完成时被动语态的形式是 have/has +been + done.
翻译成是游客已被告知要保持树林的整洁

Visitors have been asked to keep the woods clean and tidy
现在完成时的被动语态

现在完成时的被动语态

有have说明是现在完成时，有been说明是现在完成时的被动

have been 表示过去完成时

Visitors have been asked to keep the woods clean and tidy~

当然是主语补足语拉

这是被动语态,就不会有宾语的问题

游客必须保持园林整洁干净。
中文比较少用被动语态。