Present or future unreal refers to a situation that does not exist in the present and/or will not exist in the future. For example, If I had any free time, I would meet with you. This sentence means ( Sorry, I do not have any free time ).
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After you found and wrote sentences, put them in practice while you are speaking English with your friends. Thus, just to have the knowledge of this grammar point is not sufficient; you should internalize it by using it in your speech.
So you learned a new grammar point today which was present or future unreal. Search it online to see many examples provided for it.