Examples

Rotate

div.a {
  transform: rotate(20deg);
}

Skew

div.b {
  transform: skewY(20deg);
}

Scale

scale or scaleX or scaleY.

div.c {
  transform: scaleY(1.5);
}

Translate 3D

translate3d(-20%, 12%, 0);

Combined

el { 
  transform: skewY(-10deg) scale(1.2) translate3d(-20%, 12%, 0);
}