Answer:
1. He put in a lot of effort, but couldn't escape arrest.
2. A rolling stone gathers no moss.
Explanation:
A compound sentence is a sentence that consists of two or more independent clauses. An independent clause is a clause that can stand alone as a sentence, which means that it contains all elements a sentence should contain (a subject and predicate) and expresses a complete thought.
A simple sentence is a sentence that consists of a single independent clause.
The first sentence can be transformed into a compound sentence by changing the phrase In spite of all of his efforts into an independent clause (He put in a lot of effort) and connecting it to the second independent clause by a coordinating conjunction.
The second sentence can be transformed into a simple sentence by turning the relative clause (that keeps rolling) into a present participle (rolling).
