What's "for [subject] to [verb]" mean and when can this sentence structure be used?

Native speaker’s answer
Rebecca
"For [subject] to [verb]" specifies the subject and the action or purpose that is there in relation to other information or context. You could use it as an example, conditional, or statement to specify an action or information for someone or something. Ex: For dogs to swim, there must be water. Ex: The trees make it hard for us to see the mountains from the window. Ex: For a business to do well, the business plan must be foolproof.