préposition

to; at, in (a place, a city); with (a characteristic) 

à cause de 

preposition(al phrase)

because of, on account of

followed by a noun or pronoun, not by a clause

"à cause de toi" because of you

"à cause du temps" because of the weather

"a cause de ça" because of that

à côté de 

preposition(al phrase)

beside, next to

à droite

adverb(ial phrase)

on the right 

à gauche 

adverb(ial phrase)

on the left 

à peu près 

adverb(ia) phrase

about, approximately