Are the tenses in this sentence correct?
If you would have worked hard you would not have had to suffer this much.
or should this be correct?
If you would had worked hard you would not have had to suffer this much.
I am not sure whether I should use have or had following would.
Best Answer
Both of your suggested sentences are incorrect. You want to talk about a hypothetical situation: to do this, for most sentences you simply backshift the tense, in the same way that you would for reported speech. As you will see from this link, simple past goes to past perfect:
Plug that into the sentence, and you get:
You only use would for hypothetical situations when you need the past of will.