Noura: I really liked today’s History lesson, Suha. I think that Leonardo da Vinci was the greatest inventor of all time.
Suha: Really? Are you sure about that? I thought he was an artist.
Noura: Yes, I’m absolutely sure. He drew the first pictures of a flying machine. This was hundreds of years before the Wright Brothers made the first aero plane!
Suha: Hmm, maybe. But anyone can draw a picture! I think Ibn al-Haytham is the most important inventor.
Noura: Do you really think that?
Suha: Yes! I’m quite sure! He invented the camera in the eleventh century. He showed how we see. Can you imagine our world without cameras? He’s much more important than Leonardo da Vinci.
Noura: I doubt it. Let’s see if we’ll be talking about cameras in 500 years!
- Asking if someone is sure:
- Are you sure about that?
- Do you really think that?
- Being sure:
- I'm absolutely sure.
- I'm quite sure.
- Being unsure:
- Maybe.
- I doubt it.
