Oxymoron
Examples of an oxymoron is the lady is 90 years young. This is a oxymoron because 90 years is old not young. Another example is icy fire because when someone says ice they think of cold but icy fire would be something that i hot and col
Sarcasm
"That's okay, honey. I used to believe in things too" this is sarcasm because they still believe in something. "If at first you don't succeed try something easier" this is sarcasm because just because something is easy you shouldn't stop and try something easier. Another example is when drew Carey said " Oh, you hate your job? Why didn't you say so there's a support group for that it's called everybody, and they meet at the bar." 
Exaggeration
That homework took me forever. This is exaggeation because if i took forever then you couldnt do anything but homework and eventually you would die. Another example is I haven't seen him in forever. This is exaggeration because if you haven't seen him in forever then you woudln't know who he was.
