The sign for "hard" uses "bent-V" hands. The dominant
hand moves. The base hand does not move. In the main version, both
hands are using "bent-V" hands. There is another version in which the
base hand is a palm-down "S-hand."
Sample sentence: "Do you think this class is hard?"
Here is an example of another non-dominant hand handshape that some people use with this
sign. See how the left hand is in an "S" handshape?
Use a larger motion and more facial expression than the normal sign for hard.