"Él ve el perro."
Translation:He sees the dog.
how come the 'conjugate' button in the peek menu says that él va, not ve?
You have to click "er" once you click the Conjugate button. It allows you to switch between the "ir" and "er" stems
This is ver, "to see", not vir, "to go (to)", so there is no "a el perro" that becomes "al perro"
What Ikrehbiel meant, is that if you talk about a person or a pet you have to put an 'a' before the article every time. So this sentence would be like: ' Él ve a el perro'
Yes, that's correct. But it is possible that the man sees a dog in general, and does not have a relationship with it yet.