If you mean how can you get them with the standard US keyboard layout enabled, the answer is that you can't. You must enable a layout with accents, such as US-international.
Originally Posted by alloftheabove
Looking at System Settings for KDE 4, I can see that it very helpfully informs the GUI user what commands are being used behind the scenes. (I believe that all GUIs should do that! GUIs should inform people, not dumb them down!).
If you mean to ask whether you can get accents with a physical keyboard which follows the standard US layout, then yes. Absolutely any keyboard can do so. It doesn't matter what letters are printed on the keys. I used to use the Spanish layout on a UK keyboard. I now use US-international with AltGr, on a US keyboard (all keyboards are US here in Australia).
setxkbmap -model pc104 -layout us -variant # Standard US layout
setxkbmap -model pc104 -layout us -variant intl # This is US-international
setxkbmap -model pc104 -layout us -variant alt-intl # Older alternative version of the above
setxkbmap -model pc104 -layout us -variant altgr-intl # This variant uses the AltGr key