Can you identify a simile, oxymoron and metaphor?

Do you remember your grammar lessons from school? Are you a pedant when it comes to punctuation? Do you flinch when you see misplaced apostrophe's ...

While many adults will happily swear, hand on heart, that they have never split an infinitive, there are others who would struggle to identify an infinitive in a sentence, let alone take precautionary measures against splitting one.

In fact, research has suggested that one in five parents can't remember how to use an apostrophe, while almost a quarter do not know when to use a colon or semicolon.

A simile is a comparison between two thaings that are alike that uses the word "like" or "as" in he comparison. Such as "cute as a kitten" or "crazy like a fox.".
An oxymoron is two words together that contradiction each other or make no sense such as "an intelligent idiot."
A metaphor is a figure of speech hat implies a comparison, but it does not just the word "like". Such as "the curtain of night" or "all the world is a stage."