have been to是現(xiàn)在完成時的用法,表示曾經去過某地
have gone to同樣也是現(xiàn)在完成時的用法,表示去了某地還沒有回來
want只是想要的意思,是瞬間動詞,沒有現(xiàn)在完成時的任何用法,只有wanted,這個也很少用到,因為一般說想要都是一直想要即想要的心情一直持續(xù)到現(xiàn)在,除非類似于He wanted to be a scientist when he was a child.After five-year hard work,he is a scientist now.這樣的用法.