ç°å¨è¿è¡æ¶ be doing Listen ! they are singing. They arenât singing. Are they singingï¼ Yes ,they are./no ,they arenât. what are they doing? Listen!The children _______________(sing)in the classroom. Look! The woman over there ______________ (look) at you. The boys ________________ (swim)in the river now. Everyone in my family_________ (be) busy now. But my brother ____________(play) with the cat.