Neither. Use "He has been working for the last five years."
Present perfect continuous eg has been working is used with for and since as time markers
For is used with a period of time eg for ten years, for 10 minutes, for the last five years.
Since is used with a point in time eg since wednesday, since 10 am, since last year, since the holidays
Only the second sentence is correct: (John has been working here since August). Hope that helps. The first example could be correct if you susituted "is" for "was." Example: John was working here since August...although it would need to have something followed such as "John was working here since August, but he has since left the company.
No. "I have known him for 5 years." Would be more correct.
It has been 5 years since you knew him.Read more: It_has_been_5_years_since_you_knew_him._Is_this_sentence_grammatically_correct
No. She is working. She has been working.
Years is the correct spelling.An example sentence is "it has been several years since the last accident".
Camp Farah, Afghanistan Becoz, i have been working here since 2009. 100% correct.
No. The proper phrasing would be:"I haven't been with my daughter for four years (now)." (now is understood)The word since is used to date from a specific past event or time, e.g."I haven't been with my daughter since my divorce four years ago.""I haven't been with my daughter since 2008."It can also be phrased colloquially using since to introduce a clause:"It has been four years since I was with my daughter."(meaning it has been four years since the last time I was with my daughter)
Seti has been working for 97 years
No hasn't been working since 2009
Their first album came out ten years ago (2002) but they've been working together since around 2000-01.
Tim Burton and him have been working together for 25 years since 2010
It has been 525 years since 1492.