+450.+ +A simple sentence is a sentence which makes a single assertion,
question or command.+
The simple sentence contains only words and phrases.
+451.+ +A complex sentence is one which contains a principal statement
and one or more modifying statements.+
The statements made in addition to the principal statement are made in
dependent clauses. The complex sentence has only one main clause and one
or more dependent clauses.
+452.+ +A compound sentence is one which contains two or more
independent clauses.+
These compound sentences may contain any number of dependent clauses but
they must always have at least two independent or principal clauses.
These principal clauses are always connected by co-ordinate
conjunctions, for the principal clauses in a compound sentence are
always of equal rank or order.