on monday at 4:00 pm,l [was] [be] at home.i was watching TV.为什么用把be改
问题描述：
on monday at 4:00 pm,l [was] [be] at home.i was watching TV.为什么用把be改
答
结合后面用的was 说明是过去时 所以前面也用be的过去式 所以用was