They are!"I'm going to work in an hour" sounds like- "I gonna go-ta work in-a hour.
Here are a couple of Americans who are gonna speak in native English and help you master your English.
Holy
(adj): Sacred, divine, blessed.
Holiday: a holy or festive day; a day off, vacation (also sacred)
Expressions: Holy Cow! Literally true in India.
Ex: Holly Mackerel! Delicious, healthy and full of mercury.