143.Have been to have gone to

143. Have been to ，have gone to， have been in
Have been to“去过某地” （说话时已回来）后可接次数once， twice，表示去过某地几次
My father has been to the Great Wall twice, but he has never been to Canada.

have gone to“去了某地”，（或在去的途中或已到达，说话时还没回来）
My mother isn't at home. She has gone to the supermarket.


have been in“在某地待了多久”，常与时间段状语连用。
How long has your uncle been in Hong Kong?
He has been in Hong Kong for five years.