Last update July 25, 2016


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Last update July 25, 2016


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 http://www.write-better-english.com/writing-style.aspx
 http://ezinearticles.com/?The-Difference-Between-Formal-and-Informal-Writing&id=594208
 http://linguapress.com/grammar/styles-of-english.htm
 http://www.wikihow.com/Avoid-Colloquial-(Informal)-Writing
 http://forum.wordreference.com/threads/formal-way-of-saying-to-carry-out-an-activity.2482262/
 http://dictionary.cambridge.org/us/grammar/british-grammar/formal-and-informal-language
 http://www.englisch-hilfen.de/en/words/informal1.htm
 https://guinlist.wordpress.com/2015/06/29/108-formal-and-informal-words/
 http://www.engvid.com/english-resource/formal-informal-english/
 http://ielts-academic.com/2012/07/06/informal-formal-vocabulary-for-ielts/