have sth in common，中“sth”只能为“几件事”吗？

Question

例如i have four things in
common with him.
i have only one thing in
common with sister.

Answer 1

你好，
1. sth.大都指 (一个) 没有具体说明或不指定的东西（a thing that is unspecified or unknown.）
2. 通常在各种表述中，用来表明其描述或陈述量是不确定的。（something usually used in various expressions indicating that a description or amount being stated is not exact.）
所以 sth. 没有几件事的意思。
we have something in common
我们有些共同之处。
以上仅供参考！