Why does the dog always look at me quietly?

When the dog sits still and looks at you, it wants to play with you, or you take something from the dog, it is waiting for you to give it back, or it may ask you to help it get something it can't get, or some actions you do make the dog feel incomprehensible. Anyway, the dog is sitting still, watching you, trying to get in touch with you and express his love for you.

Dog: It belongs to Chordata, Vertebrate, Mammalian, True Order, Carnivora, Schipoda and Canidae. Chinese is also called "dog", and dogs are distributed all over the world. Dogs, horses, cows, sheep, pigs and chickens are also called "six animals".

References:

Baidu Encyclopedia-Dogs (Canine Mammals)