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Sing Along What are you doing？ What are you doing? What are you doing. dear John？ Im singing. Im dancing. Im having a happy time. What are they doing? They are watching TV. What are the boys doing? They are playing football. What are they doing now? They are singing.Make a dialogue with your partner. Be动词的用法动词的用法 动词宝宝动词宝宝Be有话说有话说 我我(I)用用am，你，你(you)用用are， is连着他连着他(he)，(she)，(it)； 单数名词用单数名词用is， 复数名词全用复数名词全用are。 Lets sing a song Whats he doing？ Whats she doing？ What are they doing？ Hes dancing. Shes singing. They are having a happy time. What is he doing? He is fishing.