I don't have a partner to practice English with.请问with在这里是什么用法,并请说明原因.

I don't have a partner to practice English with.请问with在这里是什么用法,并请说明原因.
I don't have a partner to practice English with.
请问with在这里是什么用法,并请说明原因.

I don't have a partner to practice English with.请问with在这里是什么用法,并请说明原因.
to practice English with.是后置定语,修饰 a partner
同时to practice English with与a partner
又构成动宾关系.即practice English with a partner,因此with不能省略
又如：I have no seat to sit in .我没有座位坐.
They have nothing to worry about.他们没有什么忧虑的.