The word 'through' has only one syllable (pronounced throo).
through--1 syllable light--1 syllable from--1 syllable heaven--2 syllables If you're trying to write the first line of a haiku, you're doing well.
1
1 + 2 = 3 syllables
1
2.
1
1
1
"It's" has 1 syllable. "It is" has 2 syllables.
"That's" has 1 syllable. "That is" has 2 syllables.
1 + 2 = 3 syllables
1