The Control key on your PC keyboard maps to your Mac's Control key.  The Windows key on your PC keyboard maps to your Mac's Command key.

When using a PC keyboard you would use <kbd>windows key</kbd><kbd>C</kbd> to copy and <kbd>windows key</kbd><kbd>V</kbd> to paste, etc.

You can set universal keyboard shortcuts in **System Preferences > Keyboard > Keyboard Shortcuts > Application Shortcuts > All Applications**.  In the example below I've set <kbd>control</kbd><kbd>C</kbd> to copy and <kbd>control</kbd><kbd>U</kbd> to paste.

![Example][1]
  [1]: https://i.sstatic.net/VgpM2.png