Questions & Answers about Czy zgadzasz się z nim?
Why is "with him" translated as z nim?
The preposition z (meaning "with") requires the following word to be in the Instrumental case. The basic word for "he" is on, but its Instrumental form is nim. So, "with him" becomes z nim.
Why is the word for "with" just z here, but in other phrases it is ze (like ze mną)?
You use ze instead of z when the next word starts with a difficult group of consonants, just to make it easier to pronounce. For example, mną starts with "mn", which is tough to say after a single z, so it becomes ze mną. But nim starts with a single consonant, so the basic z is easy to say: z nim.
What does the się do in this sentence?
The verb for "to agree" in Polish is zgadzać się. It is a reflexive verb, meaning it always pairs with the little word się (which literally means "oneself"). You cannot just say zgadzasz on its own to mean "you agree"; you must include the się.
Can I add ty (you) and say Czy ty zgadzasz się z nim?