When told to sit down, the dog does nothing. At this time, the main thing to do is to press the dog’s butt down and then put the dog into a sitting position. Then the dog may not understand what you mean and jump up. At this time, don't worry about it, just let it jump.
There is no need to rush to give the dog food at this time, because it has not yet met your basic requirements. At this time, you have to keep shouting "sit" repeatedly, and then repeatedly place the dog's butt in a Just sit in a sitting position, let the dog consciously feel that when you shout "sit", it will assume the posture you have given it with your hands.
When the dog and you repeat the process and have conditioned reflexes, and the dog can basically complete this simple action, you should start to encourage the dog, that is, give the dog some food , let it eat, expressing encouragement for its actions. Then in this order, the dog will remember that it has to do that kind of action so that it can get better food.
Training a dog to sit down is a boring process. The owner must be patient. When the dog cannot do it, he cannot hit or punish the dog. Otherwise, after the dog has psychological resistance, it will not take the initiative again. Made the right move. Moreover, this process cannot be completed in a day or two. The owner must be mentally prepared for several days to train it to sit down.