Why is it necessary for a foreign learner of English to study phonetics ?

 

In the Name of Allah,  Most Gracious, Most Merciful

Why is it necessary for a foreign learner

 of English to study phonetics ?

     PRELUDE:

      Sociolinguists advocate that speech is the first linguistic phenomenon prevailing in human communicative system. All languages, without exception, are spoken; however, a few of them are written. Man started to speak before writing or reading. Therefore, the sounds of any language preceded reading and writing. This uncontroversial fact gives rise to the considerable weight of phonetics, and hence the importance of studying phonetics. Phonetics has inevitably come to be a major branch of linguistic studies.