Question about present perfect tense.

[Aikuzo]

EnglishClub Rule:
1. Present perfect tense for experience
2. Present perfect tense for change
3. Present perfect tense for continuing situation

Help me out guys, I have a confusion about first and third rule right now. I know it's easy to distinguish if a sentence is on rule one just by basing on the context, like "I have seen that movie.". But what if someone just tells you "I have worked at Walmart for 5 years. ". It's quite hard to tell right, if he meant he is working at Walmart for 5 years until now, or he was just working on Walmart before for 5 years and not anymore now.

What do you guys think? xD
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I quit studying English years ago and have just come back to study the basics.

[Cerberus™]

To me it means that you still work at Walmart, or at least that you have worked there right up until this moment (3) - not that you worked there and stopped working at an unspecified time in the past some time ago (1). Perhaps it is the "for x years" that does it.

[Aikuzo]

"I have worked at Walmart for 5 years. " ---- I'm just guessing but maybe that "just now rule" for 'for' could also mean 'recently'? And sometimes, 'recently' could change from 5 mins ago to a month ago depending on the speaker's viewpoint.

Like:
- "Our semester has just started." (he began 15 days ago)
- "I have taught it for years." (Like maybe he's been teaching for more than 10 years, and considers stopping it for a while for about a month he considers 'recently')

Still I'm not sure. Is this a correct view to approach these matter? xD Or just use past tense on these and be done with it? :lol:
_________________
I quit studying English years ago and have just come back to study the basics.