English is an international language widely used in business, information and technology, advertising, broadcasting, and so on. A high level of English proficiency is a must if students want to pursue these fields after their school days. Teachers play a vital role in improving students' spoken English proficiency to meet job demand. According to Bulley (2004), the most decisive element for English is sound. Zaidan and Jassem (1997) also agree and state that the sound of English knowledge is an important element in speaking English as a native speaker. This makes it more important for English language teachers to know the sounds of the English language (Deterding & Poedjosoedarmo, 1998). Teachers need to discover knowledge of phonology to help themselves and students in teaching and learning. Teachers' awareness of this importance will help students to be fluent in their English language in speaking, listening and reading. According to Fromkin, Rodman & Hyams (2003), phonology is the study of the ways in which speech sounds form systems and patterns. Phonetics is also one of the important elements in phonology. Phonetics is the study of the sound of speech Fromkin, Rodman & Hyams (2003). As a future English language teacher, it is important to gain knowledge of phonology to guide students in their speaking, reading, and listening skills. Therefore, this essay will discuss how knowledge of phonology can help in the future role of an English language teacher. An English language teacher's knowledge of phonology can help them improve their own pronunciation and can help students with different first language backgrounds to pronounce English words correctly. Teachers in Malaysia in particular have...... half of the paper ......: 67-84Nik Rahila by Dato'Wan Ibrahim, Mohd Fauzi Kamarudin and Sharimllah Devi Ramachandran. (2007). A comparative study of Chinese ESL students from Malaysia and the People's Republic of China in their pronunciation of /r/ and /l/. Retrieved April 13, 2014, from http://repo.uum.edu.my/3261/1/N3.pdfSardar Fayyaz ul Hassan. (2012). The nature of stress in the English language: A study from the perspective of the rule-governed approach. The language in India. 12Tetsuo, N. and Jeroen VDW (2011). On the rhythm marked by the syllables and the rhythm marked by the accent in the English of the world: revisited. Retrieved April 13, 2014, from http://ci.nii.ac.jp/els/110008767608.pdf?id=ART0009842069&type=pdf&lang=en&host=cinii&order_no=&ppv_type=0&lang_sw=&no=1397375005&cp=Torgesen, JK And Mathes, PG ( 1998). What every teacher should know about phonological awareness. Florida: Florida Department of Education.