| Complex sentences contain | { | Words,Phrases and Dependent clauses. | The man works steadily in the factory whenever there is work. |
| Compound sentences contain | two or more principal clauses, as: | The sun rises and the day dawns. | |
462. Take the simple subjects and simple predicates in Exercise 5, and build up sentences; first, by adding a word, then a phrase and then a clause to modify the subject; then add a word and a phrase and a clause to modify the predicate.
So long as you have only words and phrases you have simple sentences. When you add a dependent clause you have a complex sentence. When you unite two independent clauses in one sentence, then you have a compound sentence, and the connecting word will always be a co-ordinate conjunction. These will be readily distinguished for there are only a few co-ordinate conjunctions.
Go back to the lesson on co-ordinate conjunctions and find out what these are, and whenever you find two clauses connected by these co-ordinate conjunctions you know that you have a compound sentence. Remember that each clause must contain a subject and predicate of its own. When you have two words connected by these co-ordinate conjunctions you do not have a clause. Each clause must contain a subject and a predicate of its own.
463. Here is an example of a sentence built up from a simple subject and a simple predicate:
SIMPLE SUBJECT ENLARGED
Simple Subject and Predicate—Soldiers obey.
Adjectives added—The enlisted soldiers obey.
Phrase added—The enlisted soldiers in the trenches obey.
Clause added—The enlisted soldiers in the trenches, who are doomed to die, obey.