The word "compound" means "composed of two or more parts".
We can combine two or more independent clauses (or simple sentences) to create a COMPOUND SENTENCE.
Notice that in the first compound sentence, the two thoughts are separated with a comma and the word “and”, while in the second sentence, the two thoughts are separated by a semicolon.
A compound sentence has to have two independent clauses - that is, there needs to be a subject and predicate that go in one part of the sentence, and a subject and predicate that go in a different part of the sentence.
If you just put in two subjects and/or two predicates, that does not automatically make it a compound sentence.
NOT COMPOUND: Bob and Doug ate and drank. (One compound subject and one compound predicate, but not two independent clauses)
NOT COMPOUND: I swam and fished. (One simple subject and one compound predicate, but not two independent clauses)
Combining sentences CAN create a compound sentence, but it depends on how you combine them.
TWO SENTENCES: I like coffee. I like tea.
COMBINED INTO COMPOUND: I like coffee, and I like tea.
COMBINED, BUT NOT COMPOUND: I like coffee and tea.
Compound sentences CANNOT start with “Because”.
A compound sentence can be any of the four kinds of sentences.
Rule of Thumb: COMPOUND SENTENCE
Write two separate, complete sentences, then join them together. You can join them in one of two ways: you can add a comma and the word “and” between them, OR you can stick a semicolon between them.
I like to play soccer. I like to play basketball. --- two sentences
I like to play soccer, and I like to play basketball. – ONE compound sentence.
I like to play soccer; I like to play basketball. – one compound sentence
I like to play sport. I am very good.
I like to play sports, so I am very good.
I like to play sports; I am very good.