Used to
VerbsRule 5 of 10
The rule
"Used to" + base verb describes a past habit that is over: "I used to live in Seoul." After did or didn't, drop the d: "Did you use to work there?" It is not the same as "be used to + -ing", which means you are comfortable with something now.
Wrong and right
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Wrong I use to play tennis every weekend.
Right I used to play tennis every weekend.
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Wrong I used to living in Seoul.
Right I used to live in Seoul.
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Wrong Did you used to work at a bank?
Right Did you use to work at a bank?
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Wrong She didn't used to like coffee.
Right She didn't use to like coffee.
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Wrong I am used to wake up early now.
Right I am used to waking up early now.