Hello.

In one of my English textbooks I read that "b" "d" and "g" are voiced consonants, while "p", "t", "k" and "f" are voiceless.
Aren't there other voiced and voiceless consonants?
What about other consonants? Aren't "L", "m" and "n" also voiced? What kind of consonants are "w" and "y"?
It's from English Grammar by Gakhokidze. It's a Georgian-English textbook.