Need some detail in the use of following idioms as they are confusing
1.) Would Vs Would have
2.) Because Vs Because of Vs Due to
If + Past Tense would + inf
If + Past Perfect Tense would have + past participle
Because + SENTENCE
because of + NOUN
due to should only be used as a complement (i.e., after a be-verb (yeah, stupid rule, but some people are adamant about it)) NOT as a preposition (i.e., NOT at the beginning of the sentence).
Pure opinions from learnings , use it at your discretion.