My current dog surprises me with his comprehension of what I am saying. I started out with basic commands such as Come or Stay. He has the habit of waiting for me by the mail box on the road about a quarter of a mile from the house when I leave to go to town. When I get out to check the mail I tell him "Go to the house" and he is off like Rin Tin Tin. He also seems to understand Let's go home." When we both go to the mail box, I tell him "Let;s go check the mail" and he heads for the door heads down the road with me. Winner is a shelter dog that looks like an Irish setter. He loves kids and is very protective when we are out for a walk if other animals approach.
Dogs really DO understand their master's voice: Researchers find canines process language in a similar way to humans
Sussex researchers have found that pet dogs process language in a similar way to humans, learning to recognise the groups of consonants and vowels that make up spoken commands.