One resource I count on for informative, intelligent and fun bits about English is the Visual Thesaurus website. Here’s an article in the site’s Teacher at Work column about the amusing yet frustrating experience English language learners have with the phrasal verb: The Tyranny of Phrasal Verbs: Turned On or Turned Off?
What’s a phrasal verb? A verb plus another word, most often a preposition, that together change the original meaning of the verb. (Five appear in this post!) Find out more in the article.