I have known him for a long time vs I have known him since a long time

The phrase 'I have known him for a long time' is correct, while 'I have known him since a long time' is incorrect. The preposition 'for' is used to indicate the duration of time in English, while 'since' is used to specify a point in time when an action started.

Last updated: March 20, 2024 • 3114 views

I have known him for a long time

This phrase is correct and commonly used in English.

This phrase is used to express that you have been acquainted with someone for an extended period.

Examples:

I have known him for a long time, and we are very close friends now.
She has been working at the company for a long time.
They have been living in that house for a long time.
We have been studying English for a long time.
He has been playing the guitar for a long time.

Show examples from the web [+]
Last updated: October 21, 2024

May 27, 2022 ... I have known him for a long time. There doesn't seem to be any doubt that 2 is perfectly correct and perfectly idiomatic; however, I'm not ...
Nov 25, 2020 ... "I have known him for a long time" makes more sense if the person is alive and you have an ongoing relationship with him.
Oct 29, 2021 ... I have known him (for) a long time. /I´m not sure here if "for" can be left out or not/ Thank you :). owlman5. Senior Member. Colorado.
Mar 29, 2013 ... We are both virgins (he does have more experience), and while I have known him for a long time, I don't know him as well as I'd like. I want ...
May 31, 2016 ... I want to say in German I have known him for a long time. In this context I met somebody five years ago and the person has been my acquaintance since.
Jul 25, 2024 ... ... I HAVE KNOWN HIM FOR A LONG TIME WHEN WE WOULD MEET AT TAMMY'S HOUSE FOR EASTER GONE BUT NEVER FORGOTTEN CELEBRATE WITH YOUR DAUGHTER. Randy ...
I just want to say that from all this you would gather I have known him for a long time. I have. I have known him since before most of you were born, at ...
Oct 13, 2021 ... Today I went on an outing with a friend and his young daughter. My friend is in his 30's and I have known him for a long time.
Feb 28, 2024 ... I have known him for a long time. He is now in heaven with all great angels. Praying for all friends and family and my daughter and ...
We are both virgins (he does have more experience), and while I have known him for a long time, I don't know him as well as I'd like. I want to wait until ...

Alternatives:

I have known him for ages.
I have known him for years.
I have known him for a while.
I have known him for a considerable amount of time.
I have known him for a lengthy period.

I have known him since a long time

This phrase is incorrect in English. 'Since' is used to refer to a specific point in time, not a duration of time.

The correct usage of 'since' is to indicate the starting point of an action or event.

Show examples from the web [+]

Jun 17, 2013 ... "The film is directed by Milan Luthria and I have known him since a long time. He used to assist (Mahesh) Bhatt sahab and my first ever song ...
I was trusting my director as I have known him since a long time," Tabu said. " Fortunately or unfortunately they (makers) come to me with these kind of characters ...
Jan 23, 2016 ... I have known him since a long time. We were together for Anna Hazare's movement, but now he has become a self-centered man. He is hungry ...
I have known him since a long time when he came for the first time and join the Faculty of Business and Management in May 2009, and also witnessed his way ...

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I have known him for a long time vs I have known him since a long time