第1个回答 2014-09-23
We have to have piano classes and dance classes every Sunday.
第2个回答 2014-09-23
every Sunday, i have to have piano and dance lesson
第3个回答 2014-09-23
We have to take piano and dancing lessons every Sunday.本回答被网友采纳
第4个回答 2014-09-23
We are obliged to take piano and dance classes every Sunday.
追答建议你用我用的短语，或者have no choice but表示不得不，这样才地道。
第5个回答 2014-09-23
every weekend，we have to have piano and dance leassons