There's a football under the chair变复数

问题描述:

There's a football under the chair变复数

There are some footballs under the chair(s)。
意思应该是对足球变复数吧,椅子变不变都行、

There are some footballs under the chair.

there are some footballs under the chair.

There're some footballs under the chair(s).

There are footballs under the chair(s)