I need help trying to figure out if the sentence is simple or compound;
The party, planned at the last moment, was a success.
To be a compound sentence, there must be two subjects, each with its own verb. What is or are the subjects in this sentence?
To determine whether the sentence is simple or compound, we need to look at its structure.
In this case, we have one independent clause that contains one subject and one verb: "The party was a success." This independent clause can stand alone as a complete sentence.
The phrase "planned at the last moment" is a dependent clause. It adds additional information to the sentence but cannot stand alone as a complete sentence.
Because we have only one independent clause, the sentence is simple.