The use of FOR
We use For when we measure the duration – when we say how long something lasts.
For + a period of time
To measure a period of time up to the present, we use the present perfect tense and not the present tense.
To measure a period of time up to the present, we use the present perfect tense and not the present tense.
- I have known her for a long time. (Correct)
I know her for a long time. (Incorrect) - I have lived here for ten years. (Correct)
I live here for ten years. (Incorrect)
The present tense with For refers to a period of time that extends into the future.
- How long are you here for? (Until when)
- How long have you been here for? (Since when)
The use of SINCE
Since gives the starting point of actions, events or states. It refers to when things began.
Since + a point in time (in the past), until now.
- I've been waiting since 7 o'clock.
- I have known him since January.
With since we use the present perfect tense or the past perfect tense.
- I have been here since 5 o'clock and I am getting tired.
- I had been working since 5 o'clock and I was getting tired.
Since can also be used in the structure It has been + period of time + since.
- It has been two months since I last saw her.
- It has been three years since the last earthquake.
No comments:
Post a Comment