[Grammar] Difference between if and whenever

[Venus.jam]

What’ the difference between “if” and “whenever”? Can we use them interchangeably?
and are the following sentences correct?

1. It will be made clear whenever/if he comes.

2. It would be made clear whenever/if he came. (Does this sentence mean that he didn’t come?)

 

[GoesStation]

Only "if" works in these sentences.

 

[Venus.jam]

How can I know when to use whenever or if? In what situations can we use whenever?

 

[GoesStation]

How can I know when to use "whenever" or "if"? In what situations can we use "whenever"?

You can use it whenever you could replace it with "at any time that".

Use "if" when you're expressing a choice between different conditions.

 

[Tdol]

In what situations can we use whenever?

He has to show his pass whenever he comes. (= every time he comes)