Where do we need to add letter "O" to prepositions?

We have special rules for prepostions like these:
1. In the explanatory dictionaries, the semantic difference of prepositions is not indicated in any way. 2. The expression "go to the doctor" - "идти ко врачу" is simply inconvenient for pronunciation. 3. The preposition K is more common, and we use KO in special cases, when there is a meeting of consonants, inconvenient for pronunciation.
On the other hand, the regularity of phonetic inconsistencies is difficult to determine, for example: to me - ко мне, to everything - ко всему, but: to the meeting - к встрече
В, ВО - If the word after the preposition begins with two consonant letters, the first of which is B or Ф, then in the speech and in the letter the preposition ВО is used:
In a fragment - во фрагменте, in a phrase - во фразе, in France - во Франции, in French - во французском, in a vial - во флаконе
Во фрагменте этого фильма есть очень интересная цитата - There is a very interesting quote in the film.
Во французском ресторане мы попробовали новое летнее меню - We tasted a new summer menu in the French restaurant.
In the second - Во втором, on Tuesday - во вторник, in yesterday's - во вчерашнем, in a look - во взгляде, in possession - во владении, in any - во всяком
!! Also, the preposition ВО is used with the following words: In many ways - Во многом, in many - во многих, in all - во весь, in the name - во имя
С, СО) The principle of use is the same as in the previous pair of prepositions. The letter O is added to the preposition C, if the preposition is used with a word that starts with two consonant letters.
Со стула - from the chair, со мной - with me, со слезами - with tears, со всеми - with everyone, со многими - with many
In the case of the preposition O, the letter Б is added when the word after preposition begins from the vowels А, И, О, У, Э.

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12 Kasım 2018
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Igor Chernyi

$9.00
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Hi! I'm Igor. I've been teaching online for more than 3 years. Previously, I lived in the U.S.A. Colorado, and worked there as a private teacher. Now I have my own specific way of teaching and it would be a pleasure to teach everyone of you. I'm really good with beginners and intermediate students because most of my students have the similar level. I think you remember that the best way to learn a foreign language is to take classes with a native speaker, and it's also important to do it with a professional teacher, because if they're not, you may learn the language incorrectly from the beginning. So I advise you do it right from the start. Thank you for your time, and see you in my classes.
Flag
Rusça
globe
Rusya
time
Yeni!
Konuşur:
Rusça
Ana Dil
,
İngilizce
C2
Hi! I'm Igor. I've been teaching online for more than 3 years. Previously, I lived in the U.S.A. Colorado, and worked there as a private teacher. Now I have my own specific way of teaching and it would be a pleasure to teach everyone of you. I'm really good with beginners and intermediate students because most of my students have the similar level. I think you remember that the best way to learn a foreign language is to take classes with a native speaker, and it's also important to do it with a professional teacher, because if they're not, you may learn the language incorrectly from the beginning. So I advise you do it right from the start. Thank you for your time, and see you in my classes.