why extrude or move move not moving fluid when I try to move or extrude part in my modeling is not moving fluid is just jump to the next position how I do to rester like before fluid?
If it's happening when you move or extrude, it may be that you have Snapping turned on accidentally.  Check in your header bar and make sure you've got it turned off.

It's easy to accidentally turn it on with the hotkey Shift+Tab.