Weak Form Used only in unstressed positions A weak form of a word is generally distinguished from a strong form r(1). by the difference in vowel-sounds, r(2).by the absence of a sound (vowel or consonant), r3). by the difference of in the length of a yowelWeak Form Used only in unstressed positions. A weak form of a word is generally distinguished from a strong form (1).by the difference in vowel-sounds, (2).by the absence of a sound (vowel or consonant), (3).by the difference of in the length of a vowel