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Complete the student's nostalgic blog post about growing up.
When I was a little kid, I _________________________ think that the moon followed my parents' car. Now I know it's just an optical illusion! My younger brother and I _________________________ argue in the backseat about who the moon liked better.
When I was a little kid, I used to think that the moon followed my parents' car.
We use "used to" + base verb to talk about past states or habits that are no longer true. Notice that we spell it with a "d" in affirmative sentences!
My younger brother and I used to argue in the backseat about who the moon liked better.
Again, "used to" describes a repeated action in the past (arguing) that doesn't happen anymore.