quickest way is to rotate the object to the direction you wish to strafe, move it, then put it back in the direction is was at, while keeping the camera viewing in the forward direction.
edit
if shiftkey()
key = 1
text 0,30,"ping"
rotate object 3,0,-90,0
rotate camera 0,object angle y(3)+90,0
phy move character controller 3, 200.0
`position object 3,object position x(3)-30,object position y(3),object position z(3)
`PHY SET rigid body position 3, object position x(3)-30,object position y(3),object position z(3)
endif
Dark Physics makes any hot drink go cold.