English grammar

Module 4, Sentence Parts, Lesson 4:

Compound Subjects and Predicates

Score:
English grammar
Definition:
A sentence has a compound subject when it has more than one subject. It has a compound predicate when there is more than one predicate. Sometimes sentences can have both a compound subject and a compound predicate.
Rachel and Steffi read the same book. (compound subject)
Ulysses ran, swam, and rode a bicycle in the triathlon. (compound predicate)
My dog and ferrets play and sleep together. (compound subject and predicate)

Compound subjects and predicates are joined with either the coordinating conjunctions (and, but, or, nor) or the correlative conjunctions (both/and, either/or, neither/nor, not only/but also).

Hint:
Don't confuse a verb phrase with a compound predicate.
We will be going to China this summer. (verb phrase - it has only one main verb - going)

A compound predicate might share a helping verb, or it might be two (or more) separate verb phrases.

Dolphins are swimming and splashing near our dock. (swimming and splashing share the helping verb are.)
Dolphins do swim and do splash near our dock. (do swim and do splash have the same helping verb but are two separate verb phrases.)
Dolphins do swim and might splash near our dock (do swim and might splash are two separate verb phrases.).
Hint:
Don't confuse a simple sentence with a compound subject and predicate with a compound sentence.
Sam and Clarence are talking and eating at the same time. (compound subject and predicate - notice the pattern: subject, subject, verb, verb. Both subjects are doing both verbs.)
Sam is talking, and Clarence is eating at the same time. (compound sentence - notice the pattern: subject, verb, subject, verb. The first subject is doing the first verb, and the second subject is doing the second verb.)

Practice What You've Learned

English grammar
Directions:
Use the toolbar above to underline the subject(s) of each sentence once and the verb(s) of each sentence twice. Do not include the conjunctions. After each sentence, decide if the previous question had a compound subject, compound predicate, or both.
1.
During the storm, the electricity and the phones were cut off but were soon restored.
2.
compound subject / compound predicate / both
3.
Soldiers and sailors defend our freedom.
4.
compound subject / compound predicate / both
5.
Astronauts train for years and then travel to space just a few times.
6.
compound subject / compound predicate / both
7.
Almonds and grapes make healthy snacks and taste good.
8.
compound subject / compound predicate / both
9.
Police officers and firefighters lead dangerous lives.
10.
compound subject / compound predicate / both
11.
Cars and trucks can break down but should be repaired quickly.
12.
compound subject / compound predicate / both
13.
Tape or glue will be needed for this project.
14.
compound subject / compound predicate / both
15.
Elizabeth studied hard and passed the test.
16.
compound subject / compound predicate / both
17.
Dujuan and Sebastian played basketball and sang in the choir.
18.
compound subject / compound predicate / both
19.
Airplanes roared over our roof and landed at the airport.
20.
compound subject / compound predicate / both
Score: