* "The cat scratched the door, trying to get in." (This uses "scratch" in its literal sense, meaning to rub with the nails.)
* "I scratched my head, trying to figure out the answer." (This is figurative, meaning to try to understand something.)
* "The band scratched out a rough version of the song." (This means to play something in a basic, unrefined way.)
* "He scratched the surface of the topic, but didn't go into much detail." (This is a metaphor, meaning to only touch on a subject briefly.)
* "She scratched her name on the tree." (This uses "scratch" in its literal sense of carving.)
These are just a few examples – "scratch" can be used in many different ways, depending on the context!