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.