been to表示“曾经去过某地（已回）”。如：-Where were you just now?-I have been to the library.（现在已经回来了。）gone to表示“去了某地（还没回来）”。如：-Where is Jack? -He has gone to the library.（现在还没回来。）而been in表示“呆在某地”。如：I have been in...
been in: 在 He's been in the doldrums ever since she left him. 自从她离开他以来，他一直很消沉。 been to: 去过，到过 I've never been to the States. 我从未去过美国。 been at: 在 We found out later that we had been at the same school...
