This study aims at studying the phonetic or syllable changes that occur on the last sound of a word when this sound is a consonant or a vowel. The study is also concerned with exploring the relation between the last sound of the word and the first sound of the next word. An example on that is when the last sound changes into a sound similar to the sound of the following word, wherein both sounds are assimilated. The study shows that if the last sound is a vowel, caused for instance by the vocal; then, changes do not happen, where in such case the vocal separates the end of the word from the beginning of the next word. This emphasizes the importance of vocals in separating the speech and avoiding misconception.