If i want to write an notice (information) about for example a company, is it correct to use Present Perfect?
For example in sentence
"The company X has been running its business activity in western Europe since 1995."
I this sentence Prsent Simple tense seems to me better but can I use "since" or should I replace it with "from"?
a) "The company X runs its business activity in western Europe since 1995."
b) "The company X runs its business activity in western Europe from 1995."
So, to make it clear, "since" is reserved only for Present Perfect, isn't it?
When 'since' is used to denote the starting point of a time period/point that extends up to the present, then the present perfect id normally appropriate. Present tenses are normally not appropriate.
You could also use has run.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.