예전에는 매일 밤늦도록 안잤지.
I used to stay up late evrey night.
use to
used to
Used to vs Use to: Differences and Grammar Rules | YourDictionary
Use to or Used to: Know the Differences and Rules
Did you use to swim? Or did you used to swim? Find out when you should use both used to and use to with examples and grammar explanations.
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