Yestrday Jack and Tom __were___ at school
首先,两个人所以用复数are
其次,昨天用过去时~Ann sometimes _______TV in the evening.Now she's ______TV in her room.(watch)watches(一般现在时第三人称）watching(现在进行时）____he at home last night?(be)Was过去时~The girls like______after class.(sing)Was啊~第三人称单数，过去时~The girls like______after class.(sing)singing~like后面加动词的ing形式~