Pronunciation plays an important role to convey speakers' feelings, thoughts and attitudes while he/she produces a language. Even though, English language learners want to sound like natives, but they still make numerous errors. The objects of this study are to explain and identify the errors of segmental phonemes among Libyan English students, and how to cope with these errors. This book attempts to explain the errors of segmental phonemes that Libyan English students have when they pronounce English language sounds. It covers the consonant sounds, vowel sounds, diphthongs and consonant clusters.