* The Sun: You can't see the sun and moon at the same time because the sun is so bright. It overpowers the moon's light, making the moon invisible during the day.
* The Moon: The moon can sometimes be seen during the day, especially when it's close to being full. It's usually much fainter than during the night, but it can be visible if you know where to look.
* The Stars: You can see stars during the day, but it's very difficult. The sun's light is so strong that it washes out the starlight, making it nearly impossible to see them.
So, to answer your question directly:
You can see the moon during the day, but it's not always easy. You can never see the sun and moon at the same time, and you rarely see stars during the day.
