have been / have gone

have been 係表示「曾經做過」，例如「have been wrote」表示曾經寫過某啲嘢。「have been」唔一定有「去」嘅意思，用「have been」表示「去過」嘅意思係因為「be」可以解作「在」，於是「have been」就可以解作「曾經在（某處）」，從而引申為「去過」。

至於「have gone」係「go」嘅past participle，即係「曾經去」嘅意思。

如果話「I have gone to HK.」係表示「我曾經去香港」。而咁嘅句式通常會跟限定詞表示時間，例如「I have gone to HK last year.」，即係「去年我曾經去了香港」。而若果話「I have been in HK.」則係表示「我曾經喺香港」，意思上同前一句有少少分別。

2012-01-09 08:08:50 補充：
Jenny has gone to Japan. 只係表示Jenny曾經去日本，但唔等如話Jenny 現在仍在日本。而Jenny has been to Japan. 亦只係表示Jenny曾經去過日本，並唔一定表示Jenny已經離開咗日本。無論係前句抑或後句，要知道Jenny是否仍在日本，都要視乎上下文而定，以為「has gone」等如「仍然在」與及「has been」等如「已離開」都只係想當然而已，並無任何文法上嘅跟據。

2012-01-09 08:12:38 補充：
舉例：Jenny has gone to Japan last summer holiday. And she decided to go again this year. 好明顯Jenny現在並唔喺日本。

2012-01-09 08:24:42 補充：
舉例二：Jenny has been to Japan in early childhood. The trip brought her many pleasant memories. So she immigrated to Japan after college graduated. 明顯Jenny雖然「has been to」日本，但現在都仍然在日本。

Jenny has been to Japan in early childhood. (incorrect tense)
Jenny was in Japan in her early childhood.
Jenny has been in Japan since her early childhood.

2012-01-10 02:10:52 補充：
have been to Japan = 曾經去過日本

Has Jenny been to Japan?
Yes, she is in Japan right now.

如果身處當地，唔會用 have been to

分別:

has/have gone:
Jenny has gone to Japan.
表示Jenny現在在日本。

has/have been:
Jenny has been to Japan.
表示Jenny去過日本，但現在不在日本。

希望我可以幫到你! ^v^