NoteO in the Future IF Clause is not Tense at all, even if the meaning is the future as, for example,He will go for a walk if the rain will stop (error).He will go for a walk if the rain stops (be)"O" will be used in IF-Clause, but it does not show the "future tense", but refers to a "willing, or intend to do," for example, If you will (Willingness) to sign this agreement, I will let you have the money at once.But the text above will be more polite if you use "would" like If I would sign this agreement, the money will let you have at once.• Hypothetical conditions or conditions that can not be true both in the present and the future (Unreal Conditions, Conditions or Hypothetical Supposition)
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