Profuisset: this ought properly to be profuerit, but the conditional dicerem changes it.
Dixerunt: Halm brackets this because of dixerunt above, parts of the verb dicere are however often thus repeated by Cic.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "infini" in a variety of sentences. We hope that you will now be able to make sentences using this word.