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Fragments, Run-Ons and Clauses

A 40-minute Grade 4 lesson on relative pronouns, progressive tenses and correcting sentence fragments and run-ons.

Fragments, Run-Ons and Clauses is a free 40-minute Grade 4 English lesson plan for Common Core standard L.4.1 — use relative pronouns, progressive verbs, modal auxiliaries and correct adjective order. It is timed across 5 sections, gives the exact wording to use where the wording carries the mathematics, names 3 misconceptions with the teaching move that addresses each, and ends with an exit ticket and a printable worksheet with its answer key.

Grade:
Grade 4
Length:
40 minutes
Standard:
L.4.1

Grade 4 · Language

L.4.1

Demonstrate command of the conventions of standard English grammar and usage when writing or speaking.

Objective

Students will be able to identify a fragment or a run-on and correct it in two different ways.

Students are successful when they can

  • Identifies fragments and run-ons.
  • Corrects each two ways.
  • Uses a relative pronoun to combine clauses.

What you need

  • Sentence cards, some faulty
  • Relative pronoun cards: who, whose, whom, which, that
  • The printable practice sheet linked at the end of this plan

The lesson

Warm-up — three tests

5 min
  1. Name the three tests: has a subject, has a verb, expresses a complete thought.
  2. Apply them to four cards.

Teach — two fixes each

13 min
  1. Take a fragment. Fix it by adding what is missing.
  2. Fix the same one by joining it to the sentence beside it.
  3. Take a run-on. Fix it by splitting.
  4. Fix the same one with a conjunction, and note the two fixes read differently.
  5. Then combine two sentences with a relative pronoun and say what it made possible.
“Two fixes, and they are not the same sentence. Choose the one you meant.”

Guided practice — fix eight

12 min
  1. Pairs identify and fix eight faulty sentences, two ways each.
  2. They mark which fix they prefer and why.
  3. Two of the eight are correct already — they must notice.

Independent practice

8 min
  1. Students complete the sentences page.
  2. It mixes fragments, run-ons and correct sentences.

Close

2 min
  1. Give one fragment. Take both fixes.

What goes wrong, and why

Each of these is a reasoning error rather than carelessness. The fix addresses the reasoning.

Fixes a run-on with a comma.

Why: A comma marks a pause, and there is one.

Fix: A comma cannot join two complete sentences. It needs a conjunction or a full stop.

Calls any short sentence a fragment.

Why: Fragments are usually short.

Fix: The three tests. 'She ran.' passes all three.

Calls any long sentence a run-on.

Why: Run-ons are usually long.

Fix: A long sentence with correct joining is fine. Count the complete thoughts and the joins.

If they are not there yet

  • One fix rather than two.
  • Fragments only.

If they finish early

  • Fix a run-on three ways.
  • Write a fragment a good writer would use deliberately.
  • Combine three sentences using a relative pronoun.

Exit ticket

Fix this run-on two ways. Which do you prefer, and why?

What to look for: Two structurally different fixes. A comma splice means the comma-cannot-join rule needs restating.

Printable practice for L.4.1

Free to print and copy, answer key included. Each sheet can generate a fresh set of problems for a retake.

Questions about Fragments, Run-Ons and Clauses

How long does the Fragments, Run-Ons and Clauses lesson take?

40 minutes, split across 5 timed sections: warm-up 5 min, teach 13 min, guided practice 12 min, independent practice 8 min, close 2 min. The minutes are stated per section and add up to the stated length, so the plan can be cut or extended at a section boundary rather than abandoned halfway.

Which standard does Fragments, Run-Ons and Clauses teach?

CCSS.ELA-LITERACY.L.4.1 — L.4.1, Language for Grade 4: “Demonstrate command of the conventions of standard English grammar and usage when writing or speaking.” In plain terms, use relative pronouns, progressive verbs, modal auxiliaries and correct adjective order.

What do I need to teach this lesson?

Sentence cards, some faulty, relative pronoun cards: who, whose, whom, which, that and the printable practice sheet linked at the end of this plan. Everything listed is either ordinary classroom equipment or a free printable from this site — there is nothing to buy and nothing to prepare beyond photocopying.

What mistakes should I expect in this lesson?

Three, each a reasoning error rather than carelessness: fixes a run-on with a comma; calls any short sentence a fragment and calls any long sentence a run-on. The plan gives the thinking behind each one and the teaching move that addresses the thinking rather than the symptom.

How do I know whether the lesson worked?

The exit ticket asks: “Fix this run-on two ways. Which do you prefer, and why?.” Two structurally different fixes. A comma splice means the comma-cannot-join rule needs restating. That tells you whether the class needs a reteach or a thirty-second conversation before you plan tomorrow.

Is there a worksheet to go with Fragments, Run-Ons and Clauses?

Yes — 1 printable L.4.1 worksheet, linked at the end of the plan and free like the rest of the site. Each one comes with an answer key and 25 versions, so the practice after the lesson can be a different paper on every desk.

Is Fragments, Run-Ons and Clauses free to use?

Yes. The plan, its printables and their answer keys are free to read, print and photocopy for your own class, with no account and no email capture. It was last reviewed on 7 September 2026. Please do not resell it or republish it as your own.

Last reviewed 2026-09-07. Aligned to L.4.1 of the Common Core State Standards for English language arts.