A: You are reading (read) a book about modern art! I don't believe (not believe) it! You hate (hate) modern art!
B: I know. But now I need (need) to learn about it.
A: Why?
B: Because my girlfriend is studying (study) it at college this year and she loves it.
A: What's that picture on the left? Can I see it?
B: It's a woman, and I think she is walking (walk) in a garden...I don't really know.
A: Let me see... No, she is not walking (not walk). She is flying (fly).