Question

I have been learning grammar ....... for three years now

Nessa frase qual preposição dessas aqui em baixo eu coloco?
To---- up ---- of ---- out ---- by
About ---- infront of ----behind
After ---- without ---- on ---- with
Befone --- around -- across -- in
Over--- from -- down -- under

Answer 1

A preposição correta nesta frase seria ABOUT!