Se utilizan para referirnos al tiempo.
ALREADY (YA) Afirmativa
I have
already done my homework
EVER (NUNCA) Afirmación y pregunta
Have you
ever go to Amazonas?
Have you
ever seen a seal?
NEVER (NUNCA)
Negación
I have
never gone to Amazonas
YET (TODAVÍA
–AÚN) Pregunta y negación
Have you
done your homework yet?
Haven’t
you done your homework yet?
