Antequam and priusquam take the Subjunctive to denote an act as anticipated.
Antequam a te proxime discessi, numquam mihi venit in mentem, quo plus insumptum in monimentum esset quam nescio quid, quod lege conceditur, tantundem populo dandum esse.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "antequam" in a variety of sentences. We hope that you will now be able to make sentences using this word.