@Aerovistae J'y vais, je vais là-bas par exemple ? Dans ce cas y est le pronom personnel qui remplace là-bas (adverbe). I gather it might sound weird to an English native because in English there's only word: there.
@user128932 I can give you my own opinion on the so-called Pimsler system. it's crap. We do not learn, we can't learn a second language as we have learnt our mother tongue.