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Simple or complex?

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Free printable simple or complex sentences worksheets for 3rd grade. Students identify whether sentences contain one independent clause (simple) or an independent clause with a dependent clause introduced by a subordinating conjunction (complex). These worksheets introduce a key grammar distinction for 3rd grade and beyond. Part of our sentences worksheets collection.

What You'll Learn

  • Classify sentences as simple or complex based on clause structure
  • Identify the independent and dependent clauses in a complex sentence
  • Recognize subordinating conjunctions that signal complex sentences

FAQ

What makes a sentence complex rather than simple?

A complex sentence has one independent clause and at least one dependent clause introduced by a subordinating conjunction (e.g., because, when, if, although) — for example, 'She smiled when she opened the gift.'

How do students identify a complex sentence?

Students look for a subordinating conjunction that introduces one of the clauses — if one part of the sentence cannot stand alone as a complete thought, the sentence is complex rather than simple.

Why are complex sentences important in 3rd grade writing development?

Complex sentences allow students to express nuanced ideas — cause and effect, conditions, time sequences — and the Common Core expects 3rd graders to produce complex sentences in their writing.

Grade
3rd Grade
Ages
Ages 8-9
Subject
Grammar & Writing
Format
Printable PDF

Ratings & Reviews

3

Priya N.

Kindergarten Teacher · Verified download

Apr 2026

This is going straight into my lesson plans the second it drops. Please prioritize this one!

Helpful · 13

Emily W.

Homeschool parent · Verified download

May 2026

Excited for this one! I've been hunting for a good printable on this topic for weeks.

Helpful · 9

Rachel H.

Homeschool parent · Verified download

Apr 2026

We've been waiting for this topic. Signed up just to get notified when it's ready.

Helpful · 6

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