For instance,even native speakers are often not sure when to use "lie" and when to use "lay."

VOA: special.2010.02.11

When they could not use hammers, they used dynamite.

VOA: special.2009.08.12

But others, even when they know the risks, do not want to use condoms.

VOA: standard.2009.10.21

President Obama did not use the word "democracy" when speaking about Afghanistan on Friday, although he spoke of such democratic principles as elections and human rights.

VOA: standard.2009.03.27