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WT 350 Understanding Sentences

Teacher Tips and Answers


WT 350

Page 350

Understanding Sentences

Important Things to Know About Sentences

    1. A sentence expresses a complete thought.

    2. A sentence has two basic parts—a subject and a predicate (verb).

    3. A sentence makes a statement, asks a question, gives a command, or shows strong emotion.

    4. A sentence begins with a capital letter and ends with a period, a question mark, or an exclamation point.

You can find more about sentences on the next three pages and on pages 47–51.

Sentence Guide

Understanding Student
© Thoughtful Learning 2025

WT 351

Page 351

Parts of a Sentence


The subject names someone or something. The subject is often doing something.

  My big brother flies RC airplanes.

  (My big brother is the complete subject.)

  His Spitfire strafes the dandelions.

  (His Spitfire is the complete subject.)

  My super-soaker can’t bring it down.

  (My super-soaker is the complete subject.)

Simple Subject

The simple subject is the main word in the subject.

  My big brother flies RC airplanes.

  (Brother is the simple subject.)

  His Spitfire strafes the dandelions.

  (Spitfire is the simple subject.)

  My super-soaker can’t bring it down.

  (Super-soaker is the simple subject.)

Compound Subject

A compound subject is made up of two or more simple subjects joined by and or or.

  My big brother and I re-enact the Battle of Britain.

  (Brother and I make up the compound subject.)

WT 352

Page 352

Parts of a Sentence (continued)

Predicate (Verb)

The predicate tells what the subject is or does.

  Twix is a friendly porcupine.

  (Is a friendly porcupine is the complete predicate.)

  She begs visitors for apple chunks.

  (Begs visitors for apple chunks is the complete predicate.)

Simple Predicate (Verb)

The simple predicate is the main word in the predicate part of the sentence.

  Twix is a friendly porcupine.

  (Is is the simple predicate.)

  She begs visitors for apple chunks.

  (Begs is the simple predicate.)

Compound Predicate (Verb)

A compound predicate has two or more simple predicates (verbs) joined by or, and, or but.

  Twix greedily chomps and squeaks.

  (Chomps and squeaks make up the compound predicate.)

Subject-Verb Agreement

The subject and verb of a sentence must “agree.” Both are singular, or both are plural.

  Twix loves fruit.

  (The singular subject Twix agrees with the singular verb loves.)

  Porcupines love fruit.

  (The plural subject porcupines agrees with the plural verb love.)

WT 353

Page 353

Types of Sentences

Simple Sentence

A simple sentence expresses a complete idea.

  Flowers grow.

  (This is a simple sentence.)

  Flowers and weeds grow.

  (This sentence has two simple subjects.)

  Flowers grow and bloom.

  (This sentence has two simple predicates.)

Compound Sentence

A compound sentence is two simple sentences joined by a comma and connecting word (and, but, or).

  Weeds grow, and flowers bloom.

Kinds of Sentences

Declarative Sentence

A declarative sentence makes a statement.

  Bilbo tricked three nasty trolls.

Interrogative Sentence

An interrogative sentence asks a question.

  How did he do it?

Imperative Sentence

An imperative sentence gives a command or makes a request.

  Find out in this chapter.

Exclamatory Sentence

An exclamatory sentence shows strong emotion or surprise.

  They argued until the sun turned them to stone!

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Lesson Plan Resources:

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Vocabulary List:
  • subject: the person, place, thing, or idea that the sentence is about

  • simple subject: main word of the subject without modifiers

  • compound subject: two or more subjects joined by and or or

Vocabulary List:
  • predicate: verb part of the sentence, telling what the subject is doing or being

  • simple predicate: verb without modifiers

  • compound predicate: two or more verbs joined by and or or

  • subject-verb agreement: matching a singular subject with a singular verb, or a plural subject with a plural verb

Vocabulary List:
  • simple sentence: subject and predicate expressing one complete thought

  • compound sentence: two or more simple sentences connected with a comma and a word like and or or

  • declarative sentence: statement

  • interrogative sentence: question

  • imperative sentence: command

  • exclamatory sentence: sentence that expresses emotion

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