What is the sentence structure in Flenoy worked hard and earned his degree mechanical engineering?

The sentence structure in "Flenoy worked hard and earned his degree in mechanical engineering" is compound.

Here's why:

* Two independent clauses: The sentence consists of two complete thoughts connected by the conjunction "and":

* Flenoy worked hard (subject-verb)

* He earned his degree in mechanical engineering (subject-verb)

* Conjunction: The conjunction "and" joins the two independent clauses.

Therefore, the sentence is a compound sentence.