Is it correct to use so and very together in a single sentence? For example:
You are so very funny.
Is it grammatically correct or not?
The modification of one adverb by another is frequently found in English and is perfectly grammatical. Here so reinforces very, itself an intensifier.
So very is used as intensifier of very, in negative, affirmative, and interrogative sentences, such as the following ones:
The Corpus of Contemporary American English contains examples of phrases using so very that are distributed over different sections as in the following graph.
Looking at the Corpus of Historical American English, I find the following sentences:
The graph showing the usage of so very over time is the following one.