Which is correct?
I have been.....
Crazy busy
Or
Crazily busy
crazily busy
Busy is an adjective, so it needs an adverb to modify it.
Crazily busy
Well, if you've been crazy busy, then it seems like "Crazy busy" would be the perfect way to describe it. Unless you've been performing your tasks in a way that can only be described as "crazily busy," in which case, go right ahead and use "Crazily busy"! It's all about finding the right level of craziness for your busyness, after all.
Both options can be considered correct grammatically, but they convey slightly different meanings.
"I have been crazy busy" suggests that the speaker has been extremely busy, possibly to the point of feeling overwhelmed or out of control.
"I have been crazily busy" implies that the speaker's level of busyness has been erratic or unpredictable.
In most cases, "I have been crazy busy" is the more commonly used and widely understood phrase.
The correct phrase would be "crazy busy."
To determine the correct form, you need to understand the difference between adjectives and adverbs. In this case, "crazy" is being used to describe the state of being busy. It is functioning as an adjective modifying the noun "busy." Adjectives do not have an -ly ending.
Adverbs, on the other hand, describe verbs, adjectives, or other adverbs. They frequently end in -ly. In this case, "crazy" is not describing any action or another adjective, so it does not need an -ly ending.
Therefore, the correct form should be "crazy busy."