Is this the correct way to mark the stressed and unstressed syllables with the stressed syllables being the capital letters?

upON the STRAITS on the FRENCH coast the LIGHT

That looks right to me.

Read it aloud to make sure.

Yes, the correct way to mark the stressed and unstressed syllables in this case would be to use capital letters for the stressed syllables and lowercase letters for the unstressed syllables. Here is the breakdown:

up-ON the STRAITS on the FRENCH coast the LIGHT
u-pOn the strAits on the frEnch coAst the liGht

In this example, the stressed syllables are marked with capital letters (On, Straits, French, Coast, Light), while the unstressed syllables are represented by lowercase letters (u, p, n, the, on, the, str, aits, on, the, fr, ench, co, ast, the, li, ght).

To identify the stressed and unstressed syllables in a word or phrase, it is helpful to understand the concept of syllables and stress patterns in English. Syllables are individual units of sound that make up words, and they can be either stressed or unstressed. Stressed syllables are pronounced with more emphasis or force, while unstressed syllables are pronounced more quickly or lightly.

To determine the stress pattern, you can follow these general rules:
1. Look for vowel sounds: Vowels are more likely to be stressed than consonants.
2. Identify word stress: Most multi-syllabic words have one stressed syllable, which is usually indicated by a higher pitch, increased loudness, or longer duration.
3. Consider syllable types: Certain syllable types are more likely to be stressed, such as the first syllable in a word or words with a prefix.

By applying these rules and analyzing the specific word or phrase, you can accurately mark the stressed and unstressed syllables.