There are two kins of speach in English - Fomal and informal. And they can be used in very different situations, where only one of them suits. It's not easy to distinguish them at the begginning, but after watching this video it'll be easier or you. So formal speach is used in such situations as talking to your boss, doctor, police, etc. And informal - talking to you friends and family. More of it - in the video. So check it out and improve your English!
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