but conjunction - Definition, pictures, pronunciation and usage …
https://www.oxfordlearnersdictionaries.com/definition/american_english/but_1
WEBconjunction. /bət/ , /bʌt/ used to introduce a word or phrase that contrasts with what was said before I got it wrong. It wasn't the red one, but the blue one. His mother won't be there, but his father might be. It isn't that he lied, but he does tend to exaggerate. Take your English to the next level.
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