Grammar
Sentence fragments: find and repair incomplete sentences
After the meeting ended. The team went for coffee. The first group of words leaves you waiting for the main message. It is a sentence fragment.
Identify a sentence fragment and repair it by adding a complete clause, a subject, or a verb without changing the intended meaning.
Read and practice
Read the examples and try the written questions in this guide. Listening recordings are not available for this lesson yet.
Try the written questions
Because the train was late, we missed the start. /bɪˈkɒz ðə treɪn wəz leɪt, wiː mɪst ðə stɑːt/
The short answer
A sentence fragment is an incomplete sentence. Check whether the words have a subject and a verb and whether they give a complete thought. Repair a fragment by joining it to a complete clause or by adding the missing words.
Because the bus was late, I walked home.
Why it works: Because the bus was late cannot stand alone here. I walked home supplies the complete main clause.
5 more examples
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While the children played in the garden.
While introduces a dependent clause. The reader needs the rest of the message.
Not this:While the children played in the garden,
their parents prepared lunch. What changes: The main clause completes the thought. -
The reason for the delay.
This noun phrase names a thing, but it does not contain a main verb.
Not this:The reason for the delay
was a broken signal. What changes: Was gives the noun phrase a complete predicate. -
Worked late to finish the report.
The sentence does not say who worked late.
Not this:
Raviworked late to finish the report. What changes: Adding the subject makes the actor clear. -
The keys on the kitchen table.
The words identify the keys' location but do not state what the keys did or were.
Not this:The keys
wereon the kitchen table. What changes: Were completes the sentence by linking the keys to their location. -
If the store is still open, we can buy milk.
If the store is still open needs a result. The main clause gives that result.
Not this:
If the store is still open. What changes: By itself, the if-clause is a fragment because it leaves the condition unanswered.
Read the full guide
Start by reading the words as if they were the only sentence on the page. Do they tell the reader who or what did something, and do they finish the idea? If the answer is no, look for a word such as because, when, although, or if. That word often introduces a dependent clause that needs another clause.
Check for a complete message
A complete sentence gives the reader a finished message. It usually tells you who or what the sentence is about and what happens. Read the words alone, without borrowing information from the sentence before them. If you are waiting for the rest of the idea, you have probably found a fragment.
The concert started at eight.
The concert is the subject, and started is the verb. The time information completes a clear message.
After the concert started.
After makes the reader expect another event. The words do not complete the message by themselves.
Does The concert started at eight need another clause?
No. It has a subject, a verb, and a complete idea, so it is a sentence.
Join dependent clauses to a main clause
Words such as because, although, when, while, if, and since often begin a dependent clause. A dependent clause may contain a subject and a verb, but it cannot carry the whole message alone. Attach it to a main clause that tells the reader the result or the next event.
Because Elena forgot her umbrella.
The clause explains a reason, but the reader does not know what happened because Elena forgot it.
Because Elena forgot her umbrella, she got wet on the walk home.
She got wet on the walk home is the main clause. It completes the explanation.
Complete the fragment: When the shop closed, _____.
Add a main clause, such as When the shop closed, we took the last bus home. The second clause finishes the time relationship.
Find a missing subject or verb
Some fragments are not introduced by a linking word. A phrase may have a subject without a main verb, or a verb without a stated subject. Look for both parts before you decide that a group of words is a sentence.
The new manager from Toronto.
The phrase has a subject, but it gives no information about what the manager did or was.
The new manager from Toronto arrived this morning.
Arrived is the main verb, so the reader receives a complete message.
What is missing from Finished the draft before lunch?
A subject is missing. You can write Maya finished the draft before lunch if Maya is the person who did the work.
Repair the fragment without changing its meaning
Choose the smallest repair that makes the idea complete. You can join the fragment to the sentence before or after it, add a subject, add a verb, or rewrite the words as one full sentence. Keep the original relationship between the ideas.
The library was crowded. Because students were preparing for exams.
The second group explains the reason, so it should not stand alone.
The library was crowded because students were preparing for exams.
Joining the clauses keeps the cause-and-effect meaning and removes the fragment.
Repair: A useful idea for the newsletter.
Add a verb, such as The idea is useful for the newsletter. You may use a different complete sentence if it keeps the intended meaning.
Use context, but do not depend on it
In a conversation or personal note, people sometimes use short fragments because the context is obvious. A report or formal email gives the reader fewer clues, especially when the text is read later. Use complete sentences there unless you deliberately choose a fragment for a clear stylistic reason.
Need a reply by Friday.
This may work as a quick personal note, but it has no stated subject and sounds incomplete in a formal email.
I need your reply by Friday.
The complete sentence clearly states who needs the reply and when.
Which version is safer in an email to a new client?
Use I need your reply by Friday. It is complete and does not force the reader to infer the subject.
Before you go
Remember this
Read each sentence by itself. Look for a complete thought, a subject, and a verb. If a dependent clause begins with because, when, although, while, or if, connect it to a main clause. If a noun phrase or verb phrase is incomplete, add the missing part so the reader can understand the full message.
Practice with the written examples
You can practice with the written questions in the Learn tab. Each answer includes an explanation.
Try the written questionsListening test not available yet
This lesson does not have the recordings needed for a listening test. Use the written questions in the guide to check your understanding.
Try the written questionsQuestions about "Sentence fragments: find and repair incomplete sentences"
What is a sentence fragment?
A sentence fragment is a group of words presented as a sentence that does not give a complete thought. It may be missing a subject, a main verb, or an independent clause.
While the children played in the garden.
How can I spot a sentence fragment?
Read the words on their own. Check whether they name a subject, include a verb, and finish the idea. A clause beginning with because, although, when, while, or if often needs a main clause.
While the children played in the garden, their parents prepared lunch.
How do I repair a fragment that begins with because?
Join it to a main clause that gives the result. For example, change Because I missed the bus. to Because I missed the bus, I arrived late. You can also put the main clause first: I arrived late because I missed the bus.
The reason for the delay.
Can a short sentence be complete?
Yes. A sentence does not need many words. Birds fly. is complete because it has a subject, a verb, and a finished meaning. Commands can also be complete because the subject you is understood.
The reason for the delay was a broken signal.
Are sentence fragments always wrong?
No. Writers may use fragments deliberately in notes, dialogue, or creative writing. In formal and neutral writing, complete sentences are usually clearer, so repair fragments unless you have a clear reason to use one.
Worked late to finish the report.