I have gone to Sri Lanka. vs I have been to Sri Lanka.

[Kums]

Dear Mr Torsten

Please advise me the different and correctness of following sentences

1. I have gone to Sri Lanka
2. I have been to Sri Lanka.

Thanks

Kums

[LearnEnglish2009]

I think

1.) I have gone to Sri Lanka.------> I am in Sri Lanka.--->now
2.) I have been to Sri Lanka. ------> I was in Sri Lanka.--->before

3.) I have been in Sri Lanka.-----> I am in Sri Lanka for days.--->for days (now)
4.) I had been in Sri Lanka.-----> I was in Sri Lanka for days.--->for days (before)

For example:

--Where is Jim？
--He has gone to England．
--My father isn't here．He has gone to England．

--My father has been to Sri Lanka twice．
--I have never been to Sri Lanka．

--I have been in Sri Lanka for three years．
--He has been in Sri Lanka for half a month．