A simple sentence is a sentence, for example: I played a game. And a compound sentence is I played game and I ate my food.
compound
nothing
A simple subject and simple predicate are the two main parts of each sentence. A simple subject is the common pronoun, noun, or proper noun that tells who the sentence is about. A simple predicate is the verb in the sentence that acts on the subject.
Stop and think! - It is a simple sentences This is an imperative sentence, there is no subject just two verbs.
Not a simple sentence, but a compound, complex or compound-complex may have its principal or independent clause in inverted order within the sentence.
it is compound sentence
Compound simple
This sentence is a simple sentence because it contains only one independent clause.
compound
The sentence is compound.
Simple sentence, compound sentence, complex sentence and compound complex sentence.
compound sentence, simple sentence, and complex sentence
nothing
Yes, it is possible to use a compound subject in a simple sentence. A compound subject consists of two or more subjects that are connected by a coordinating conjunction such as "and" or "or." For example, "Sara and Emma went to the park" is a simple sentence with a compound subject "Sara and Emma."
simple
simple, compound, complex, compound-complex
If you are talking about predicates it is simple. If you are talking about subjects it is compound.