This document discusses strong and weak syllables in English. It defines strong syllables as having full vowels and weak syllables as having reduced vowels like schwa. Weak syllables can contain schwa, close front vowels like i, close back vowels like u, or syllabic consonants like nasalized n. Function words like prepositions and articles typically have weak forms with reduced vowels in connected speech. The document also discusses syllabic liquids and nasals that can occupy the vowel slot in weak syllables. Strong forms are used for emphasis, stress, or when words are pronounced in isolation.