Since / For are used with has, have forms. However, they have different usage.
- Suppose you have started doing this course an hour ago, say, 10 am.
- It is 11 am now.
You should say:
- I have been doing this course from 10 am.
- I have doing this course for the last 1 hour (10 to 11).
- I have done this course for the last 1 hour.
Study the difference:
|Since + a start time||For + the duration from the starting time.|
|She has been under my care since Monday.||She has been under my care for three days.|
Remember, you can use since when you know the starting time. You can use for when the duration is known.
- Even if the action started an hour ago or a thousand years since, you can use have, have been, has, has been + since / for if the action is not interrupted
- Can we use since in place of ‘as’?
- Yes, but that “since” is different in usage and meaning. That’s like, “Since (as) I was too late for the session, I didn’t understand the use of since.”
Ready for the Test?
- Mr Derek has been diabetic _______ 2020.
- Ms Preethi has been under your treatment ______ January.
- I don’t mind _____ how long I have been under you care. My concern is my poor prognosis.
- She had been under our care _____ three years and then we transferred her to the district nurse.