difficult to do /to be done

difficult to do /to be done to do 还是 to be done be adj to do/ be adj to be done 歌曲中含有TO DO ：TO BE DONE ：TO HAVE BEEN DONE ：TO HAVE DONE be+形容词(difficult) to do something造句 be willing to do sth difficult是什么意思? something should be done to do对吗 be made to do 还是done be needed to do与need to be done To be done being done have done/to be done What should ____ must ____.A do,do B be done,be done C to be