What are the rules of pronounciation for vowels and consonants in English language?
There really are no “rules” for the articulation of sounds. It’s more about features such as place of articulation (where is the sound made), manner of articulation (type of sound), voicing (voice on/off). It’s a bit complex to discuss in this medium. Standard American English contains speech sounds that are not in many other languages and vice versa. There are various regional & cultural differences that affect sound production within the US as well. If you are not a native speaker of Standard American English and are looking to improve your speech production, you might want to work with a speech-language pathologist (otherwise known as a speech therapist) who specializes in accent modification. If you want to learn more about this area, you can research topics such as speech science, linguistics, and phonology. If you are searching for rules for spelling which in turn requires pronounciation of a word in English, that’s yet another area of language & its production. Many times you ar
