i have been the usa 3 years ago 还是i have been the usa for 3

i have been the usa 3 years ago 还是i have been the usa for 3 I have been to USA for 3 years 这个句子矛盾吗? Have you ever been a___?yes,I have been to the USA before 句型转换I have been to the USA.Li Hua has been to the USA,too.(合 have you ever been to the USA I have joined the Part for 3years .I have been a member of t 选择题"Have you ever been to the USA?" "I wish I __" I HAVE BEEN PLAYED THE FLUTE FOR FOUR YEARS 求解释The Smiths____Beijing for years. （have been i HAVE you been to the USA?(作肯定回答） What have I been doing for the past 20 years that’s been so I have been living in there for 10 years和I have lived in the