be focus on这种用法对吗

参***：不对。

原因：动词重叠

be是系动词，focus是实意动词，两个动词不能连用

如果需要连用的话，focus要变成ing形式或者focused，be focusing/focused on

例如：

Many firms are focusing on increasing markets overseas.

许多商行都专注于扩大国外市场.

It's as if all eyes are focused on me.

好像所有的目光都聚集在我身上似的。