Sentence Structure Worksheets | Language Arts Activities - Free Printable

Task: Identify and underline the simple subjects and circle the simple predicates in each sentence.

#### Definitions:
- Simple Subject: The smallest noun, pronoun, or gerund that takes an action.
- Simple Predicate: The verb or verb phrase reduced to its smallest form.

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Solution:

#### Sentence 1: Doug usually plays video games around this time.
- Simple Subject: Doug
- Simple Predicate: plays

#### Sentence 2: Today is different though.
- Simple Subject: Today
- Simple Predicate: is

#### Sentence 3: Today Doug is cleaning up messes around the house.
- Simple Subject: Doug
- Simple Predicate: is cleaning

#### Sentence 4: His mother gave him a long list of chores.
- Simple Subject: His mother
- Simple Predicate: gave

#### Sentence 5: The long list seemed overwhelming to Doug.
- Simple Subject: The long list
- Simple Predicate: seemed

#### Sentence 6: His sister, Katie, finished her chores a long time ago.
- Simple Subject: Katie
- Simple Predicate: finished

#### Sentence 7: Doug has been stalling.
- Simple Subject: Doug
- Simple Predicate: has been stalling

#### Sentence 8: Katie helped her brother Doug with his chores a little bit.
- Simple Subject: Katie
- Simple Predicate: helped

#### Sentence 9: That made Doug happier than a dog in a dirt pile.
- Simple Subject: That
- Simple Predicate: made

#### Sentence 10: Soon though he was playing video games on the couch again.
- Simple Subject: he
- Simple Predicate: was playing

#### Sentence 11: Many of Doug's chores were still incomplete.
- Simple Subject: Many of Doug's chores
- Simple Predicate: were

#### Sentence 12: Then Katie saw her brother playing video games without her.
- Simple Subject: Katie
- Simple Predicate: saw

#### Sentence 13: Having felt used, Katie left her brother alone.
- Simple Subject: Katie
- Simple Predicate: left

#### Sentence 14: A little later in the afternoon, Doug went to get a glass of juice from the refrigerator.
- Simple Subject: Doug
- Simple Predicate: went

#### Sentence 15: He saw Katie playing with her dolls in her bedroom.
- Simple Subject: He
- Simple Predicate: saw

#### Sentence 16: At first he was upset with her.
- Simple Subject: he
- Simple Predicate: was

#### Sentence 17: Then Doug realized his mistake in not helping her.
- Simple Subject: Doug
- Simple Predicate: realized

#### Sentence 18: Holding his head down in regret, Doug apologized to his sister Katie.
- Simple Subject: Doug
- Simple Predicate: apologized

#### Sentence 19: Katie graciously accepted his apology.
- Simple Subject: Katie
- Simple Predicate: accepted

#### Sentence 20: Together, both of them finished the list of chores.
- Simple Subject: both of them
- Simple Predicate: finished

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Final Answer:

The simple subjects are underlined, and the simple predicates are circled in each sentence as explained above.

Boxed Final Answer:
\boxed{\text{See explanations above for underlined subjects and circled predicates.}}