Crossword Puzzle Describing ProblemsOnline version In English, the past participle usually ends with -ed and is often used with the verb to be. When the past participle is used as an adjective, it must agree in gender and number with the noun or pronoun it describes. Complete the crossword puzzle with the correct gerund or passive infinitive. by Grupo Altum 1 2 3 4 5 6 7 8 9 10 11 12 13 13 8 12 3 2 11 9 4 1 5 10 7