The key to exercise solutions in chapter 2C - Special things for the textbook Roadmap A2 - Student's Book with authors Lindsay Warwick and Damian Williams from Pearson Education
Question
Listen and underline the stressed syllable in each word.
Answer
The stress is on the first syllable of the words longer than one syllable, i.e. beautiful, broken, comfortable, heavy, modern, special, useful. Note that comfortable only has three syllables.