Rule 5: If, in a sentence, two action clauses are to take place in the future, use simple present tense for conditional clause and simple future tense for the other clause. Example:
Incorrect: The moment she will enter the room, we will start singing the birthday song
Correct: The moment she enters the room we will start singing the birthday song.

Rule 6: For impossible past conditions, use past perfect and for its likely results use Would+Have+ 3 form of Verb. Past perfect is used for impossible past conditions. Example:
Incorrect: If Jacob would have called me. I would have picked him up from the airport.
Correct: If Jacob had called me, I would have picked him up from the airport.