Replacing letter sounds
When do you replace the sound of the letters in the first column for the sound of the letters in the second column?

ь - п
в - ф
э - с
г - к
д - т
ж - ш

Question

Replacing letter sounds 
When do you replace the sound of the letters in the first column for the sound of the letters in the second column?

ь - п
в - ф
э - с
г - к
д - т
ж - ш

Answer

1. In the end of the word:
клуб [п]
плов [ф]
глаз [с]
мог [к]
сад [т]
муж [ш]
2. before another unvoiced consonant in the middle of the word (often with В):
ВСегда [фс]
ВСё [фс]
аВТор [фт]
АВСтралия [фс]

Answer

You're quite right. 
б - п ("б", but not "ь")
в - ф
з - с ("з", not "э")
г - к
д - т
ж - ш
They also have their soft variants.

Answer

It depends of letter position in this word,  presence of the vowels before this specific symbol and other  features. You can learn it by reading russian language textbooks or from web sites, but i have no idea where to find this rules in english.
here are russian option -  http://diktory.com/soglasnye.html

Answers · 6

Still haven’t found your answers?

Don’t miss out on the opportunity to learn a language from the comfort of your own home. Browse our selection of experienced language tutors and enroll in your first lesson now!