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access to pornography is to be strictly controlled children

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access to pornography is to be strictly controlled children need to be taught how to
access to pornography is to be strictly controlled
children need to be taught how to distinguish realities from illusions
请问这两句话的话to be to be 怎么用?
children 开始是另外一句话忘加句号了。
access to pornography is to be strictly controlled children
这两句话中的be是跟后面的动词分词联系的,构成被动语态.
be controlled被控制 be taught被教