IF CLAUSE -- TYPE 3

Fact: Last week, it rained heavily. Yulio didn't come to Rina's birthday party.
In such a condition,  you really wanted to go there, but it was very impossible to do
because it rained heavily.
To express conditional sentence, the formula used is type 3.

If It had not rained heavily, Yulio would have come to Rina's birthday party.

Type 3:
    IF CLAUSE                                EXPECTATION
    If, past perfect                              -> past perfect future
          1. (+) had + V3                     (+) would + have + V3  / been

               (-) had not + V3                (-) would not have +V3 / been      
                                                                                            (Adj, Adv, N)   
          2. (+) had been (Adj, Adv, N)  
               (-) had not been
   
Conclusion:
If the fact is in positive form (+) ->  if clause is in negative form
i.g:
They treated me badly              - >  If they had not treated  me badly
She was crazy                          ->   If she had not been crazy
or
If the fact is in negative form (-) ->  if clause is in positive form

i.g:
I didn't  have money                   ->  If I had had money
She didn't come  here                 ->  If She had come here
       
and for the expectation,
If the fact is in positive form (+) ->  Expectation is in negative form

i.g:
He went home alone                 - > He would not have gone home
                                                     alone
I was confused with your attitude - > I would not have been confused with your attitude
or

If the fact is in negative form (-) -> Expectation is in positive form

i.g:
He didn't care of me                   ->  He would have cared of me
They were not diligent                 ->  They would have been diligent