You’re telling your grandkids the story of how you and your wife (their grandmother) met. You say:
The moment I saw her, it was love at first sight.
Use this expression to talk about an event that happened suddenly after another event.
The moment I stepped out on the court, I knew that I didn't have a chance.
The moment I stepped outside, a bird flew right by and shat right on my shoulder!
But this expression is most often used to talk about what happens when you look at something:
The moment I looked at Sam, I busted out laughing.
"Love at first sight" is when you see someone, and immediately feel like you love them. It sounds very romantic, doesn't it?
A: When did you fall in love with him?
B: For me, it was love at first sight.
When you use the phrase "love at first sight", you don't need to say "I felt..." Just say "it was".
By the way, you can also use this expression to talk about things that you quickly fell in love with, as well as people:
As soon as I saw it in the lot at the car dealership, it was love at first sight.
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