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You should use "certain" if you are speaking about "certain brands that are sumptuous" since only an adjective can modify a noun. You could use the adverb "certainly" to modify "sumptuous" but the phrase "brands that are certainly sumptuous" doesn't make sense.
Jun 28, 2017
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Jun 25, 2017 · Certainly means you think something's going to happen, but certain is you are for sure something's going to happen. Certainly:
"Certainly" is an adverb which is often translated as "por supuesto", and "certain" is an adjective which is often translated as "seguro". Learn more about the ...
Apr 21, 2021 · Certain (adjective) means to be sure while. Certainly (adverb) means definitely "Are you certain they will catch the thief?"
May 27, 2024 · Synonyms of certainly. 1. : in a manner that is certain : with certainty. 2. : it is certain that : assuredly. Synonyms. all right · alright ...
Aug 9, 2010 · Certainly is used for emphasizing that something is definitely true or will definitely ... What is the difference between 'certain' and 'specific' ...