Aux or au?
When does one use each? Because I don't get it.
"Aux" is a contraction of "à" and "les" (plural definite article, masculine or feminine), "au" is a contraction of "à" and "le" (singular definite article, masculine).
Je pense aux gâteaux. - > I think about the cakes. (more than one cake)
Je pense au gâteau. - > I think about the cake. (just one cake)