Which uses the correct modifiers for formal writing?

Turn right at the next corner and then stop quickly because that's where I live.

Turn right at the next corner and then stop quick because that's where I live.

Question

Which uses the correct modifiers for formal writing? 



Turn right at the next corner and then stop quickly because that's where I live. 



Turn right at the next corner and then stop quick because that's where I live.

anonymous · Answer

Modifier means it's describing another word in the sentence. What do you think quick/quickly is modifying?

kyanthedoodle · Answer

Quick would be incorrect because it's an adjective, not an adverb. Quickly is describing the verb, stop, correctly.

jack1 · Answer

perfect answer @kyanthedoodle
question... do the rankings in English go from Grammar Police to Grammar Nazi... or what's the grading/levels there?