I can only think of a few ones
If I had ignored them, we have less success.
If I had ignored them, we will have less success.
If I had ignored them, we would have less success.
I am not even sure if the last two are wrong.
As isolated sentences they all seem wrong. I think you may be confusing yourself by using 'have' two ways. You're using it as an auxiliary verb in your if -clauses and as a main verb in the main clauses.
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As isolated sentences they all seem wrong.
I think you may be confusing yourself by using 'have' two ways.
You're using it as an auxiliary verb in your if-clauses and as a main verb in the main clauses. See what you can do with different verbs in the main clauses. Here are the three named conditionals — first, second, and third conditional — for a slightly different senten