Question

ayuda con esto porfavorrr :((​

Answer 1

Respuesta:

Present perfect con "for" y "since"

Empleando el "present perfect" podemos definir un periodo de tiempo anterior al momento presente, considerando bien su duración, caso en el que utilizamos "for" + periodo temporal,, o bien su inicio o punto de partida, caso en el que utilizamos "since" + momento concreto. "For" y "since" pueden asimismo emplearse con el "past perfect". "Since" admite únicamente tiempos verbales perfectos. "For" puede también emplearse con el "simple past".

"For" + periodo de tiempo

for six years, for a week, for a month, for hours, for two hours

I have worked here for five years.

"Since" + momento concreto

since this morning, since last week, since yesterday

since I was a child, since Wednesday, since 2 o'clock

I have worked here since 1990.

"Present perfect" con "for"

She has lived here for twenty years.

We have taught at this school for a long time.

Alice has been married forthree months.

They have been at the hotel for a week.