Have you ever seen a koala? (No)
No, I haven't.
Have you ever seen an ostrich? (No)
No, I haven't.
Have you ever seen a panda? (Yes)
Yes, I have.
Have you ever seen a llama? (Yes)
Yes, I have.
Have you ever seen a kangaroo? (Yes)
Yes, I have.
Have you ever seen a hippopotamus? (No)
No, I havent
Have you ever seen a penguin? (No)
No, I haven't.
Have you ever seen a crocodile? (Yes)
Yes, I have.