In Arabic, there are no letters for short vowels: diacritical marks are used instead. There are:
بَ
= "ba"بُ
= "bu"بِ
= "bi"Indicates the absence of a vowel. ـْ Example: بْ = "b" (consonant only)
Doubles the consonant. ـّ Example: بّ = "bb"
In Arabic, each letter has 4 different forms depending on whether it appears alone, at the beginning, in the middle, or at the end of a word.