- But with this system I can indicate how many days it exists.
- But with this system I can indicate how many days it has existed.
- But with this system I can indicate how many days it has been present.
- But with this system I can indicate how many days old it is.
The file's age can be represented in days, weeks, months, or years. (implied existence)
Sometimes it is easier to use alternative vocabulary to make the same point.
Exist or Exists is a matter of past, present, and future with indirect context.
The file was not found. Did it ever exist? It never existed.
Has been (existing) is a reference to previously existed and currently exists.
Comparing the creation and modification time stamp indicates the file existed without change, for 17 days. (Current existence is implied.)
The file does exist. It exists, in the $HOME directory.
Does the file exist? No, the file does not exist. (Or no longer exists.)
The file continues to exist where I created it.
The file is not expected to exist in any other location.
The file will still exist tomorrow.
The file is deprecated and will not exist in the next release.
The file might exist in the future.
How long the file exists is up to you.
How long the file will exist is up to the user.
A file which exists today, has existed for 137 days. It will probably exist for another 10 years.