# Sentence Fragment Practice with Explained Answers

*2026-11-11*

“The light flickered” can stand on its own. “After the light flickered twice in the hallway” has more words, including a subject and a verb. It still leaves you waiting to hear what happened next. A period can make a line look finished even when it needs another clause.

Use this worksheet to spot sentence fragments and revise a short paragraph. The answers show how to fix each fragment and check that your revision still says what you meant.

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## How to spot a sentence fragment

In a report or essay, look for a clause that can stand on its own. That’s an **independent clause**, like “The light flickered.” A **sentence fragment** is an incomplete group of words punctuated as if it were a sentence. [Purdue OWL’s guide to sentence fragments](https://owl.purdue.edu/owl/general_writing/mechanics/sentence_fragments.html)

- **A detached dependent clause.** “After the light flickered” has a subject (*the light*) and a verb (*flickered*). *After* makes the clause depend on another one. If the room went dark next, you can write “After the light flickered, the room went dark.” Keep words such as *after*, *although*, and *because* in place when you test a clause.
- **A missing subject.** “Dropped the spare key” leaves the reader to supply who dropped it. If Eli did, write “Eli dropped the spare key.” In a command like “Check the lock,” the subject *you* is understood. [Cambridge on imperative clauses](https://www.cambridge.org/highereducation/books/a-students-introduction-to-english-grammar/EB0ABC6005935012E5270C8470B2B740/clause-type/675210B6E6877604BE648512835ABE4C)
- **An incomplete verb phrase.** “The students waiting at the door” names the students. To say what they were doing, add *were* to make *were waiting*. The same *-ing* form can also describe the students in a complete sentence. In “The students waiting at the door heard the bell,” *heard* is the main verb.

When you find two clauses that can each stand alone, check how they’re joined. A comma alone can create a comma splice. Putting the clauses side by side with no punctuation or connecting word can create a fused sentence. [Comma Splice vs Fused Sentence practice](/blog/comma-splice-vs-fused-sentence/)

## Which sentence does the fragment belong to?

Maya emailed her classmates. Leo moved the meeting online because the lab was closed. The reason for Leo’s decision sits between the two events in this draft.

> Maya emailed her classmates. Because the lab was closed. Leo moved the meeting online.

You could join the fragment to either neighboring sentence and get a grammatical result.

- “Maya emailed her classmates because the lab was closed. Leo moved the meeting online.” The closure explains Maya’s email.
- “Maya emailed her classmates. Because the lab was closed, Leo moved the meeting online.” The closure explains Leo’s decision, which is what the writer meant.

When a fragment sits between two sentences, try reading it with each one. For a *because* clause, ask which action it’s meant to explain. For an *after* clause, ask which action happened next. If you put the dependent clause first, use a comma before the main clause. [Purdue OWL’s guide to independent and dependent clauses](https://owl.purdue.edu/owl/general_writing/punctuation/independent_and_dependent_clauses/index.html)

## Identify and fix the fragments

Decide whether the bold text is a complete sentence or a fragment. For each fragment, write a repair and explain what makes it incomplete. For each complete sentence, explain what lets it stand on its own.

1. **The seal broke.**
2. **Although the screen was cracked.** The numbers were easy to read.
3. **Write your initials beside each change.**
4. Nina was the only person entering responses. She opened the survey. **Recorded the first answer.**
5. **When the bell rang, the runners stopped.**
6. **The crew loading the truck when the rain started.**
7. **The team wrote down the values and checked the units.**
8. **The crew loading the truck wore rain jackets.**

### Answers and explanations

1. **Complete.** *The seal* is the subject and *broke* tells what happened. Three words are enough.
2. **Fragment.** “Although the screen was cracked, the numbers were easy to read.” The *although* clause sets up a contrast. The main clause says what was true despite the crack.
3. **Complete.** *Write your initials beside each change* stands on its own as a command with an understood *you*.
4. **Fragment.** “She recorded the first answer.” Adding *she* makes it clear that Nina did the recording. You can also join the two actions with a shared subject, as in “She opened the survey and recorded the first answer.”
5. **Complete.** *When the bell rang* is dependent. *The runners stopped* can stand on its own and tells what happened at that time.
6. **Fragment.** “The crew was loading the truck when the rain started.” Adding *was* gives the main clause a complete verb phrase and shows that the loading was in progress. *Started* is already a verb, but it belongs to the dependent clause about the rain.
7. **Complete.** *The team* is the subject of both *wrote down* and *checked*. Both verbs are part of the same independent clause.
8. **Complete.** *Loading the truck* tells you which crew. The main verb *wore* tells you what they had on.

## Revise a paragraph

A student is writing a lab report. The group put each paper towel in its own tray and poured the same amount of water onto each towel. They checked how much water was left in each tray, then recorded which towel absorbed more. Fix the fragments in the draft while keeping the steps in that order.

> We compared two paper towels. After we poured the same amount of water onto each towel. Our group checking how much water was left in each tray. The blue towel absorbed more water. Recorded the result in our table.

### One possible revision

> We compared two paper towels. After we poured the same amount of water onto each towel, our group checked how much water was left in each tray. The blue towel absorbed more water. We recorded the result in our table.

The *after* clause now tells when the group checked the trays. Changing *checking* to *checked* gives that step a verb in the past tense. Adding *we* to “Recorded the result” identifies who entered it in the table.

## When a short form fits

“After lunch” works as a reply to “When should I bring the samples?” The question supplies the action, and the reply gives the time. “Samples from the north garden” can work as a photo caption because the picture supplies the context and the phrase identifies what it shows. In the body of a lab report, use a full sentence to report a step or finding. [Pasco-Hernando State College’s guide to fragments](https://writing-center.phsc.edu/node/53)

The original practice examples were developed with AI assistance.

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