Quick answer: A compound predicate has two or more verbs that share the same subject and are joined by a conjunction. No comma goes between two verbs in a compound predicate. Commas appear only when three or more verbs form a series, when a contrast demands emphasis, or when a parenthetical phrase interrupts.
- She drafted the proposal and submitted it before lunch. ✅ (compound predicate, no comma)
- She drafted the proposal, and her manager reviewed it. ✅ (compound sentence, comma required)
What a Compound Predicate Is
Every sentence has two core parts: the subject (who or what the sentence is about) and the predicate (what the subject does or is). A compound predicate extends the predicate to include two or more verbs or verb phrases, all controlled by the same subject and connected by a conjunction.
- The dog barked and chased the squirrel across the yard. (One subject, two verbs.)
- She planned the event, coordinated the vendors, and managed the guest list. (One subject, three verbs.)
- The engine sputtered but kept running. (One subject, two verbs joined by but.)
The compound predicate includes everything attached to those verbs: objects, modifiers, adverbs, and complements. In the first example above, the full compound predicate is barked and chased the squirrel across the yard.
Conjunctions That Join Compound Predicates
Coordinating conjunctions are the most common connectors:
- and, but, or, nor, yet
Correlative conjunction pairs also work:
- She not only organized the fundraiser but also exceeded the donation target.
- The system neither crashed nor lost any data during the outage.
- You can either submit the form online or mail it to the office.
Compound Predicate vs. Compound Sentence
This is the most common point of confusion, and it directly affects punctuation. The distinction comes down to one question: does the second verb have its own subject?
A compound predicate has one subject performing multiple actions. No comma before the conjunction.
A compound sentence has two independent clauses, each with its own subject and verb. A comma goes before the conjunction.
| Compound predicate (no comma) | Compound sentence (comma) |
|---|---|
| He opened the email and forwarded it to the team. ✅ | He opened the email, and she forwarded it to the team. ✅ |
| The manager reviewed the data and approved the budget. ✅ | The manager reviewed the data, and the board approved the budget. ✅ |
| We tested the prototype and fixed the remaining bugs. ✅ | We tested the prototype, and the QA team filed the final report. ✅ |
The Diagnostic Test: Remove the Second Subject
If you’re unsure whether your sentence is a compound predicate or a compound sentence, try removing the second subject.
She reviewed the contract, and she signed it that afternoon.
Remove the second she:
She reviewed the contract and signed it that afternoon.
The sentence still works. The comma disappears with the second subject because you’ve converted a compound sentence into a compound predicate.
Now try this one:
She reviewed the contract, and her attorney flagged three issues.
Remove her attorney: the sentence breaks. Two different subjects need two different clauses, which means you have a compound sentence and the comma stays.
This one-step test resolves the distinction faster than any other method.
Compound Predicate vs. Compound Subject
These are different constructions that sometimes appear in the same sentence.
A compound subject has two or more subjects sharing one verb:
- Tom and Sarah walked to the park.
A compound predicate has one subject performing two or more actions:
- Tom walked to the park and bought an ice cream.
Both in one sentence:
- Tom and Sarah walked to the park and bought ice cream. (Compound subject + compound predicate. One clause, no commas.)
Comma Rules for Compound Predicates
Two Verbs: No Comma
The default rule: do not place a comma between two verbs in a compound predicate.
- She revised the manuscript and sent it to the publisher. ✅
- She revised the manuscript, and sent it to the publisher. ❌
The comma in the second version separates the subject (she) from part of its own predicate. It creates a false pause that makes the reader expect a new independent clause, then delivers only a continuation of the same one.
More two-verb examples without commas:
- He locked the door and walked to the car. ✅
- The team analyzed the results and presented their findings. ✅
- We discussed the options but decided to wait. ✅
Three or More Verbs: Commas in a Series
When the compound predicate contains three or more verbs, commas separate them the same way they would in any list. The serial (Oxford) comma before the final conjunction follows your chosen style.
- She drafted, revised, and submitted the report. ✅ (with Oxford comma)
- She drafted, revised and submitted the report. ✅ (without Oxford comma)
- The crew loaded the equipment, checked the route, and departed before dawn. ✅
When a Comma Is Acceptable Between Two Verbs
The no-comma rule is the default, not an absolute. The Chicago Manual of Style states that a comma is “not normally used” in a compound predicate (CMOS 6.23), and the word normally leaves room for editorial judgment.
A comma between two verbs is acceptable in two situations:
When the conjunction introduces a deliberate contrast. If the second verb shifts direction with but or yet, a comma can emphasize that shift.
- The company posted record revenue, but laid off 200 employees. (Comma emphasizes the contrast.)
- The company posted record revenue but laid off 200 employees. (Also correct. The comma is optional.)
- The software crashed, yet recovered without losing any data. (Comma draws attention to the unexpected recovery.)
When the first predicate is long enough to need a pause. If the first verb phrase runs long and the reader would benefit from a breath before the second action, a comma aids readability.
- The company has 25,000 employees working across 15 locations in four countries, and is reported to be filing for bankruptcy. (Comma helps the reader process the long first predicate before absorbing the second.)
- She completed the entire data migration by Friday afternoon, and then spent the weekend documenting the process for the new team. (Comma prevents the reader from running the two long actions together.)
In both cases, removing the comma is also correct. The comma is a stylistic choice, not a grammatical requirement. Default to no comma in academic and formal writing. In editorial, journalistic, or creative contexts, use your judgment.
Parenthetical Phrases Within a Compound Predicate
When a nonessential phrase interrupts the compound predicate, commas go around the interruption. The commas belong to the parenthetical, not to the conjunction.
- He read the report and, after some deliberation, approved the funding. ✅
- She accepted the position and, to everyone’s surprise, resigned three weeks later. ✅
Without the parenthetical, no comma would appear:
- He read the report and approved the funding. ✅
- She accepted the position and resigned three weeks later. ✅
The MLA Style Center specifically addresses this pattern: do not place a comma before the conjunction in a compound predicate, but always use commas around phrases that intervene within it.
Using Compound Predicates to Tighten Your Writing
Compound predicates eliminate subject repetition and merge related actions into a single sentence. This is one of the most effective sentence-combining techniques for tightening prose.
Before (redundant):
- The stegosaurus was around 9 metres in length. The stegosaurus had 17 plates along its back.
After (compound predicate):
- The stegosaurus was around 9 metres in length and had 17 plates along its back.
Before:
- Josh will graduate college in two more years. Josh will take a short break. Josh will enroll in a master’s program.
After:
- In two more years, Josh will graduate college, take a short break, and enroll in a master’s program.
When Separate Sentences Are the Better Choice
Not every pair of actions belongs in a compound predicate. Split into separate sentences when:
- The two actions are logically unrelated (She finished the report and watered the plants reads as a disjointed list).
- The compound predicate becomes so long that the reader loses track of the subject.
- The second action deserves its own emphasis, and burying it inside a compound predicate diminishes its impact.
Compound predicates serve conciseness. If merging the actions sacrifices clarity or rhythm, separate sentences are the better tool.
Quick-Reference Table
| Scenario | Comma? | Example |
|---|---|---|
| Two verbs, one subject | ❌ No | She wrote the draft and submitted it. |
| Three or more verbs, one subject | ✅ Commas (series) | She wrote, edited, and submitted the draft. |
| Long/complex first predicate | ✅ Optional (readability) | She wrote the entire draft over the weekend, and submitted it Monday. |
| Contrast with but or yet | ✅ Optional (emphasis) | The software crashed, but recovered without data loss. |
| Parenthetical interrupting the predicate | ✅ Around the interruption | He read the report and, after some thought, approved it. |
| Two subjects = compound sentence | ✅ Before the conjunction | She wrote the draft, and he edited it. |
FAQ
A compound predicate has two or more verbs or verb phrases that share the same subject and are joined by a conjunction. Example: The dog ran across the yard and jumped over the fence. The subject (the dog) performs both actions.
Not when it has only two verbs. The default is no comma between two verbs sharing one subject. When the predicate contains three or more verbs, commas separate them as in any series. A comma between two verbs is acceptable only for emphasis on a contrast or for readability in a long sentence.
A compound predicate has one subject performing multiple actions: She cooked and cleaned. A compound sentence has two independent clauses, each with its own subject and verb: She cooked, and he cleaned. The compound sentence takes a comma before the conjunction. The compound predicate does not.
A compound subject has two or more subjects sharing one verb: Tom and Sarah walked to the park. A compound predicate has one subject performing two or more actions: Tom walked to the park and bought an ice cream. Both can appear in the same sentence: Tom and Sarah walked to the park and bought ice cream.
Yes. Correlative pairs like either…or, neither…nor, and not only…but also work in compound predicates. Example: The team not only finished the project ahead of schedule but also exceeded every quality benchmark.
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