Language/Russian/Grammar/Punctuation

So,every people,who tried teach russian,know,that this is very difficult. For example commas,you can put it in different situations. If you call someone in your sentence: Иван,закройте окно. (Ivan,close the window) or Закройте окно,Иван.(close the window,Ivan) You must put comma before and after person's name. Also you must put comma before and after this words: Извините/Простите/Прошу прощения; Пожалуйста; Ect For example Закройте окно,пожалуйста.(close the window,please) This words can stand in different plays: Пожалуйста,закройте окно. Закройте,пожалуйста,окно. It all the same sentence.