Animate by Morpher

Select your original picture and create another 3 or 4 more with holding Shift and moving the first subject.

Then convert them to Poly.

Go to the polygon, add two of the mouth and press the Grow few times for adding all of around them, and then you can open the mouth, with moving the selected point down.

I have named it ex: (Mouth open).

Then chose the first image (Original one)

(Convert to poly), Then adds Morpher. Below you’ll see a few empty places .

In the first empty places if you add the name of the face that I opened the mouth, or I change it before you will see the original face will move with changing the number on right of the name.