分别写出下列单词的三单形式,现在分词,过去式,过去分词(急!!答:hides,hiding,hid,hid/hidden lays,laying,laid,laid rises,rising,rose,risen wears,wearing,wore,worn tries,trying,tried,tried am/is/are,being,was/were,been books,booking,booked,booked beats,beating,beat,beaten copies,copying,copied,copied costs,costing,cost,cost dries,drying,dried,dried...