In a previous lesson we asked: Τι χρόμα είναι αυτό; (what colour is this?) in the next lesson we went on to ask Τι είναι αυτό; (what is this) in relation to some common nouns. Today we will use lesson 3 below to ask Τι είναι αυτό; (What is this?) And Τι είναι εκείνο; (What is that?)