  We show the existance of the exact plaquette-ordered ground states of the
Hubbard model including site-off-diagonal interactions in arbitrary dimensions,
by decomposing the Hamiltonian as sum of products of projection operators for
each spin sector. The obtatined exact ground states are interpreted as N\'eel
ordered states on the dual lattices. We demonstrate this idea in the
one-dimensional chain and higher-dimensional lattices such as the Kagom\'e
lattice, and determine parameter regions of the exact ground states.
