I tried it with: The red car This red car Your red car And it marked "Your" like "red" and not like "The" or "This". Surely "your" is a determiner

I tried it with: The red car This red car Your red car And it marked "Your" like "red" and not like "The" or "This". Surely "your" is a determiner and not an adjective? I mean, you can't say *"The your car".