Learn on PengiElements of Language, 5th CourseChapter 4: The Clause: Independent and Subordinate Clauses

Lesson 5: Sentence Structure: Complex and Compound-Complex Sentences

In this Grade 8 grammar lesson from Elements of Language, 5th Course, students learn to identify and construct complex sentences, which contain one independent clause and at least one subordinate clause, and compound-complex sentences, which combine two or more independent clauses with at least one subordinate clause. The lesson uses clear examples and exercises to help students recognize how subordinate clauses function within each sentence structure. It builds on students' understanding of independent and subordinate clauses as part of Chapter 4's broader study of sentence classification.

Section 1

Complex Sentence

Definition

A complex sentence has one independent clause and at least one subordinate clause.

Explanation

Think of a complex sentence as a main event with a side story. The independent clause is the main show—it makes complete sense on its own and could be its own sentence. The subordinate clause adds extra, dependent details and often begins with words like because, when, since, or who.

Examples

  • My dog, who loves to play fetch, brought me his favorite ball. [The subordinate clause, who loves to play fetch, modifies dog, the subject of the independent clause.]
  • After the movie ended, we went to get pizza so that we could discuss the plot. [Two subordinate clauses, After the movie ended and so that we could discuss the plot, modify we went to get pizza in the independent clause.]

Section 2

Compound-Complex Sentence

Definition

A compound-complex sentence has two or more independent clauses, and like a complex sentence, it also contains at least one subordinate clause.

Explanation

This is the ultimate sentence mashup! It has at least two main ideas (independent clauses) that could stand alone, joined by a conjunction like and or but. On top of that, it includes at least one side story (a subordinate clause) that adds extra information to one of the main ideas.

Examples

  • The chef prepared the meal, which smelled delicious, and the waiter brought it to our table. [The sentence has two independent clauses and a subordinate clause, which smelled delicious.]
  • The team celebrated the victory, as the coach had instructed, so they went for ice cream after the game was over. [The sentence has two independent clauses and two subordinate clauses, as the coach had instructed and after the game was over.]

Book overview

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Chapter 4: The Clause: Independent and Subordinate Clauses

  1. Lesson 1

    Lesson 1: The Adjective Clause

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  2. Lesson 2

    Lesson 2: The Noun Clause

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  3. Lesson 3

    Lesson 3: The Adverb Clause

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  4. Lesson 4

    Lesson 4: Sentence Structure: Simple and Compound Sentences

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  5. Lesson 5Current

    Lesson 5: Sentence Structure: Complex and Compound-Complex Sentences

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Lesson overview

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Section 1

Complex Sentence

Definition

A complex sentence has one independent clause and at least one subordinate clause.

Explanation

Think of a complex sentence as a main event with a side story. The independent clause is the main show—it makes complete sense on its own and could be its own sentence. The subordinate clause adds extra, dependent details and often begins with words like because, when, since, or who.

Examples

  • My dog, who loves to play fetch, brought me his favorite ball. [The subordinate clause, who loves to play fetch, modifies dog, the subject of the independent clause.]
  • After the movie ended, we went to get pizza so that we could discuss the plot. [Two subordinate clauses, After the movie ended and so that we could discuss the plot, modify we went to get pizza in the independent clause.]

Section 2

Compound-Complex Sentence

Definition

A compound-complex sentence has two or more independent clauses, and like a complex sentence, it also contains at least one subordinate clause.

Explanation

This is the ultimate sentence mashup! It has at least two main ideas (independent clauses) that could stand alone, joined by a conjunction like and or but. On top of that, it includes at least one side story (a subordinate clause) that adds extra information to one of the main ideas.

Examples

  • The chef prepared the meal, which smelled delicious, and the waiter brought it to our table. [The sentence has two independent clauses and a subordinate clause, which smelled delicious.]
  • The team celebrated the victory, as the coach had instructed, so they went for ice cream after the game was over. [The sentence has two independent clauses and two subordinate clauses, as the coach had instructed and after the game was over.]

Book overview

Jump across lessons in the current chapter without opening the full course modal.

Continue this chapter

Chapter 4: The Clause: Independent and Subordinate Clauses

  1. Lesson 1

    Lesson 1: The Adjective Clause

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  2. Lesson 2

    Lesson 2: The Noun Clause

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  3. Lesson 3

    Lesson 3: The Adverb Clause

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  4. Lesson 4

    Lesson 4: Sentence Structure: Simple and Compound Sentences

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  5. Lesson 5Current

    Lesson 5: Sentence Structure: Complex and Compound-Complex Sentences

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