Be动词就三个 am is are
单数用is 复数用are
1 is Yang Ling是单数
2 These comic books（ are ）veryinteresting.comic books是复数
3There（）no people here.people 是集体名词 用复数 are
4 4.I want to （）a teacher.want to do sth ,没有动词用be动词原形 be
5 5.Where（）your sister going?your sister 是单数 is