第1个回答 2012-10-21
bought taught collected 过去式和过去分词一
第2个回答 2010-12-23
bought taught collected 过去式和过去分词一致本回答被提问者和网友采纳
第3个回答 2011-01-03
buy的过去式是bought
teach的过去式是taught
collect的过去式是collected
第5个回答 2010-12-23
buy bought bought
teach taught taught
collect collected collected