has been used和has used有什么区别,

has been used和has used有什么区别, it has been used和it has been in use有什么区别吗 has been used,has been using的区别 This username has already been used是什么意思 no.none of us has been abroad. Neither of us has been to Beijing.为什么用has Because reading has been the most educative tool used by us right from the childhood.有语法错误码? has left 和 has been away from has been to 和has gone to Every possible means____to work out the problem,but it is too difficult for us.A.is used B.has been used 为什么选B而不选A. has been 选择：Every possible means ( ) to prevent the air pollutionis used?are used?has been used?have been used? the house where i used to live has been knocked This registration code has already been used by another user. mr green has been used to jogging_________ ( day) 英语Has been to 和Has been in 怎么用? has been losing和has been lost的区别 has been to和has been in 的区别