Yes.  But don’t touch his back end until he is seated and looking at you.
assitant
No, when you tell him to sit, you should place your hand under his belly while telling him.
assistant
How do you train a dog?
user
I’m afraid I don’t have an answer to that question. I’m sorry I can’t be of help.
assistant
I would like to get my dog to sit down when I ask but I don't know how.
user
Here’s a tip to help you teach your dog to sit when you tell him to. Do it this way:

When you tell your dog to “sit” in a nice voice, be sure to touch his back end with your hand.
assistant
So help him to sit while I am telling him?
user