First of all happy easter to everyone
Hello, Hs12. Welcome to the Grammar Exchange and Happy Easter!
Hs12 posted:Are those sentences correct?
I have a friend whose car we need.
I have a friend whose car we are in need of.
Generally, "those" refers to things that come before. It would have been better to say, "Are these sentences correct?," because you are talking about sentences that you are about to mention.
The example sentences you have written are very strange, but they are grammatically correct. What context do you have in mind for them? Here are more natural sentences:
- I have a friend whose car needs gas.
- I have a friend whose car is in need of gas.
It's possible that the construction works better when the noun phrase introduced by "whose" functions as subject rather than direct object in the relative clause. Is that what you are investigating? If so, I'll try to think of a better example.