If |h.s

If

 
1. (introducing a conditional clause) on the condition or supposition that; in the event that.

If you love me, stay with me

2. (with past tense) introducing a hypothetical situation.

if you had stayed, this would never have happened

..

Si tan solo, hubiera esperado un poco más, si tan solo hubiera entendido de que se trataba estar a su lado, si tan solo no la hubiera perdido.