Hi Hafez, "We got close really "quick'' or "quickly?" In this sentence, you wanted to describe the manner in which you got close to someone. For this purpose, we use an adverb of manner. The word "quickly" is obviously an adverb of manner and is a correct choice. However, the word "quick" is both an adjective and an adverb. (Reference: https://www.vocabulary.com/dictionary/quick. Look under the definition for "adv") Therefore, you can also write: "We got close really quick." Just as a side discussion, it is also possible for an adverb to modify another adverb: We got close really (adverb intensifying "quick") quick (an adverb itself). Hope this helps.

Mark is right! There´s a big difference between proper English and that from TV, literature and what you can hear in the street.

Yeah but I got the line from a tv show and they did actually say "quick". Do you think it's one of the common mistakes?

"quickly" is correct. words ending in "ly" are almost always adverbs. "Quickly" modifies a verb ("to get there"), therefore it must be an adverb. "Quick" sounds fine in some contexts, but it is incorrect grammatically. "quick" is only used as an adjective, as in "My dog is very quick, he ran around the house 5 times in 30 seconds!"

"Quickly" because you need an adverb with a verb. "Quick" is an adjective which should be used with a noun.