to do something with or be with someone or something

问题描述:

to do something with or be with someone or something
如题.还有为什么后面是be with
to do something with or be with someone or something
=j( )

和某人一起做某事
be with 是因为单独用with表示在一起在句子中需要一个动词做谓语,with不是动词,所以用be
另外be with 有长期的意思,不是单一时间点的单一动作