把句子改成一般将来时he has been to the united states.

把句子改成一般将来时he has been to the united states. He has been to United States twice.等于什么 He has been to many countries ,such as the United States and He has already been to the United States 变成否定句 英语单选It's the first time she has been to the United States,__ It’s the first time that she has been to the United States,_ These farmers have been to the United States . ______either you and he going to the United States? When he was ___ , Joe went to the United States . go to United States 还是go to the United States 英语语法填空求助The United States has been criticized for its treatm 英语翻译The United States of America has been a democracy for mo