2、it);单数名词用is,复数名词全用are。I用___She用___It用___he用___they用___We用___you用_二、在横线上用be动词的适当形式am/is/are填空1.I ___ fine.2.I______astudent.3.Howold__________you?4.___youateacher?5.She___astudent.6.He _____not ateacher.7.It___adog.8.She___mysister.9.This ___ my teacher, Miss Wang.10.We ___ f