inside is the compound word. in and side.
The nominative pronoun "I" is part of the compound subject of the sentence.
The Berlin Wall once partitioned East Germany from West Germany.
This work can be partitioned out to the civilian sector.
This sentence is precise. + It is also a compound sentence.= This sentence is precise and it is a compound sentence.
The nouns in the sentence are teacher and class. The words "fourth grade class" can be considered a compound noun, or the compound word "fourth grade" can be considered a noun adjunct, where grade is also a noun.
A compound complex sentence is when you combind a compound sentence and a complex sentence.
10 example of compound sentence
He was prepared to cross the river.
prepared
This is a compound sentence, and it smells bad.
"building a building' is not a sentence, it's a sentence fragment. Completing a sentence by adding a subject and auxiliary verb: He is building a building. Example as a noun clause as the sentence subject: Building a building is expensive. Example as a noun clause as the object of a preposition: He plans on building a building.
Simple sentence, compound sentence, complex sentence and compound complex sentence.