http://www.engvid.com Has a teacher ever asked you to make up a class? Did you think he wanted you to decorate the classroom? Or did you understand he wanted you to do the class again? Did you ever have to back up as you were making a backup CD because something went wrong? Confused? This lesson explains some of the changes in sound and meaning when we join phrasal verbs to make nouns. Once you've watched the video, take the quiz: http://www.engvid.com/phrasal-verbs-as-nouns/
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