Question

usos do quarter past e quarter to

Answer 1

Quarter to se usa quando falta.
Exemplo : Its a quarter to 9:00 ou seja.
Faltam 15 minutos para dar 9 horas.

Quarter past se usa quando são.
Exemplo : Its a quarter past 5 ou seja.
São 5 horas e 15 minutos

Answer 2

Quarter past: 10:15 (a quarter past ten), 11:15 (a quarter past eleven), 6:15 (a quarter past six), etc.

Quarter to: 4:45 (a quarter to five), 3:45 (a quarter to four), 10:45 (a quarter to eleven), etc.

Note: using "a" is not compulsory.