Question

Como usar corretamente as preposições in, on e at para tempo e lugar?

Answer 1

exemplos de in: tempo
quando vc se refere a um significado mais amplo de tempo, ex: centuries, dacades, years, months, weeks,

places: exemplos: in a country, in USA, in NY, in neighborhood

on, casos um pouco mais especificos, ou menores:
datas especificas, on may 1st, 1998; on my birthday, on the holiday, on friday, on the weekend,

places:
on the amazonas street or avenues on the corner;

at: very specific, smallest;
like hours: at 7am, 9 o'clock

places:
at the Mall, at the coffeshop; endereço at 73, vulture street; specific location.