How can I apply this expression to other sentences?
Native speaker’s answer
Rebecca
"To one's X(emotion)" means "Causing someone to be X". So, the definition of "to someone's delight" is causing someone to be very happy. You can use this expression with other nouns that express emotion. Like, "To my surprise", "To our delight", "To his disappointment", "To her embarrassment", "To many people's dismay". Ex. To our delight, our guests decided to stay another night.