2. n. 公司（可数）

a company of：一队、一群、一伙

A company of visitors is expected to arrive soon. （视为整体时谓语动词单数）

=A company of visitors are expected to arrive soon. （考虑个体时谓语动词复数）

一批游客很快就到。

3. n. 陪伴，作伴（不可数）

He's coming with me for company.

他要陪伴我一起来。

——引用自《牛津词典》

注意：当“company”表示“陪伴”时，一般不与冠词连用。

4. n. 陪伴，作伴（不可数）

I am glad to have her company.

=I am glad to have her as company.

(宾格：她)

我高兴有她作伴。