my shoes are so dirty that they need polished这句话对吗?是用polished形式还是polishing?急

你好,有两个句型来解答.1. sth needs /wants /requiresdoing.2.sth needs/ wants /requires to be done.看例句：You need to polish your shoes=Your shoes need to be polished=Your shoes need polishing. 再如：We need to repair our house.=Our house needs /wants /requires repairing=Our house wants /needs/ requires to be repaired. 明白了吗?