Fill in the Blanks Examples of questions and answers.Online version Llena cada espacio con una forma del verbo auxiliar be. Use contracciones cuando sea necesario. Tengan en cuenta: Structure the presente tense with ing: IW+AV+S+PV+C Structure fot the answers: S+ AV + PV + C by Oswaldo Figueroa 1 am Is Are 's am are Are is 're 's Is You explaining the lesson . What he doing now ? He reading a book . I studying the lesson . you writing a letter ? we learning English ? I copying the words . What exercise you doing now ? she erasing the blackboard ? What the teacher explaining ? Jhon writing the sentences .