Grammar (noun)

I: Subject (S) - first person pronoun (subjective form)
I feel: S +Verb (V) – transitive verb
I feel nauseous: S +V + Complement (C) – object complement (adjective phrase)
I feel nauseous after: S +V + C + incomplete Adverbial (A)
I feel nauseous after studying: S +V + C + A
I feel nauseous after studying thirteen: S +V + C + A (with incomplete Object (O))
I feel nauseous after studying thirteen chapters: S +V + C + A (prepositional phrase)
I feel nauseous after studying thirteen chapters of:<><> S +V + C + A (with incomplete O)
I feel nauseous after studying thirteen chapters of Grammar: S +V + C + A (prepositional phrase)

Burp. (interjection)

I do feel sick…

It’s time for bed…