em 26 de Agosto de 2019
The prepositions for, since and ago are all used to talk about time.
For is used for a period of time that something goes on.
I’ve been working for hours.
I’ll do the job for a year.
I fed his dog for a week.
Since is a specific time in the past.
I haven’t seen you since Monday.
I’ve been working since 10 this morning.
The pipe has been leaking since yesterday.
Ago refers to a length of time before the present.
It’s 10 o’clock. You were supposed to be here an hour ago. What happened?
That happened a year ago.
I only saw you a week ago but it's nice to see you again.
You might also hear people use the following phrases:
- A long time ago
- Ages ago
- Awhile ago