"All" & "Every" - What's the difference?

source: JamesESL English Lessons (engVid)   2010年9月11日
http://www.engvid.com/ Do you want to know how to use 'all' and 'every' correctly all of the time? Every time? Find out the exact meaning and usage of these words in this advanced English grammar lesson, then take the quiz at http://www.engvid.com/english-grammar... to test your understanding.