In communicating, humans have developed languages in which they can speak in units of knowledge. These units of knowledge or information are called sentences, and there are different types used in the English language.
Sentences are sometimes classified by their structure. Sentence structures are simple, compound, complex, and compound-complex.
A compound sentence contains two or more main clauses. The main clauses in a compound sentence are usually joined by a comma and a coordinating conjunction (and, but, or, yet, for, so).
EG Many popular bands play rock and roll, but others play rhythm and blues. Sting sings rock and roll, and Puff Daddy raps, but they performed together at the MTV Video Music Awards.
Main clauses in a compound sentence may be joined by a semicolon used alone or by a semicolon and a conjunctive adverb such as (however, therefore, nevertheless) or by a semicolon and an expression such as for example.
EG. Different types of music can be fused together; ska combines rock and reggae. People often have set opinions about music; ‘nevertheless,’ one should keep an open mind. Different styles of music influence one another; ‘for example,’ rock and roll developed from jazz.