I haven't got a chair to sit in. to sit in在句中作什么成分?

I haven't got a chair to sit in. to sit in在句中作什么成分?
I haven't got a chair to sit in. to sit in在句中作什么成分?

I haven't got a chair to sit in. to sit in在句中作什么成分?
I haven't got a chair
我还没有椅子.
没有椅子用来干什么?
to sit in 用来做的.
自然是目的状语
用这种方法,就可以做出大多题了.

宾补

目的状语，或定语