2.4 Coordination, Subordination, and Recognizing Correct Sentences
Key Takeaways
- Coordination joins clauses of equal rank with the seven FANBOYS conjunctions; subordination demotes one clause and names the logical relationship explicitly.
- Choosing the wrong connector is a meaning error, not a punctuation error: 'because' asserts causation that 'although' denies.
- Upside-down subordination buries the writer's main point in a dependent clause and promotes background information to the main clause.
- Conjunctive adverbs such as 'however' and 'therefore' are not conjunctions; joining two independent clauses with one requires a semicolon or a period.
- 'Recognition of correct sentences' items reward scanning for a specific error list rather than judging which option sounds best.
2.4 Coordination, Subordination, and Recognizing Correct Sentences
The College Board outline lists syntax (parallelism, coordination, subordination) and recognition of correct sentences as distinct skills inside the Conventions area. The first asks you to combine clauses so that the grammar matches the logic; the second asks you to certify that a sentence contains no error at all. Both appear again inside the 40% Revision area, where the same structures are tested in the context of a draft.
Coordination: Joining Clauses of Equal Rank
Coordination links two independent clauses that carry equal weight. Standard Written English recognizes exactly three coordinate patterns.
| Pattern | Form | Example |
|---|---|---|
| Comma + coordinating conjunction | IC, and IC | The grant was approved**, but** the disbursement was delayed. |
| Semicolon alone | IC; IC | The grant was approved**;** the disbursement was delayed. |
| Semicolon + conjunctive adverb + comma | IC; however, IC | The grant was approved**; however,** the disbursement was delayed. |
The seven coordinating conjunctions are the FANBOYS: for, and, nor, but, or, yet, so. Each asserts a different relation — and adds, but and yet contrast, for and so assert cause and result, or and nor offer alternatives.
The conjunctive-adverb trap. However, therefore, moreover, consequently, nevertheless, thus, and instead are adverbs, not conjunctions. They cannot join independent clauses with a comma. The grant was approved, however the disbursement was delayed is a comma splice. This is one of the most heavily tested single points in the Conventions area.
Subordination: Ranking Clauses and Naming the Relationship
Subordination converts one clause into a dependent clause introduced by a subordinating conjunction or a relative pronoun. The independent clause keeps the emphasis; the dependent clause supplies the condition, cause, contrast, or timing.
| Relationship | Subordinators | Example |
|---|---|---|
| Cause | because, since, as, now that | Because the catalyst degraded, the yield fell. |
| Concession / contrast | although, though, even though, whereas, while | Although funding was modest, the team finished early. |
| Condition | if, unless, provided that, in case | The board will approve the grant if the ethics review clears. |
| Time | after, before, once, until, when, whenever | Once the archive was digitized, citations tripled. |
| Purpose / result | so that, in order that | The lab logged every reading so that the trial could be replicated. |
Punctuating Subordinate Clauses
- Dependent clause first: use a comma. Although the data were preliminary, the team published.
- Dependent clause second: usually no comma. The team published although the data were preliminary.
- Exception: a trailing clause of concession (although, whereas, even though) often takes a comma because it contrasts with, rather than completes, the main clause.
Connector Choice Is a Meaning Decision
The most common error in this skill is not punctuation but logic. Swapping the connector rewrites the claim.
| Sentence | Relationship asserted |
|---|---|
| Because enrollment rose, the college hired adjuncts. | Enrollment caused the hiring. |
| Although enrollment rose, the college hired adjuncts. | The hiring is surprising given the enrollment rise — usually false here. |
| Enrollment rose**, so** the college hired adjuncts. | Same causal claim as because, with the cause emphasized. |
| Enrollment rose**, and** the college hired adjuncts. | Two facts, no stated relation. |
When two options are both grammatical, ask which one states a relationship the passage actually supports. On revision items, a connector that asserts causation where the draft only shows sequence is wrong even though it reads smoothly.
Upside-Down Subordination
Subordination also decides emphasis. Putting the writer's real point in the dependent clause inverts the argument:
- Upside-down: Although the vaccine reduced hospitalizations by 70%, it was developed in under a year.
- Right-side-up: Although it was developed in under a year, the vaccine reduced hospitalizations by 70%.
The second version makes the outcome the claim and the timeline the concession. In a paragraph arguing for the vaccine's effectiveness, only the second is defensible.
Excessive Coordination
Strings of clauses chained with and flatten a hierarchy that the writer should be building. The council reviewed the proposal, and residents objected, and the vote was postponed tells you three things happened but not how they relate. After residents objected to the proposal the council was reviewing, the vote was postponed subordinates two of the three and states the relationship.
Recognizing Correct Sentences
Some items present four sentences and ask which one contains no error, or attach a "No error" choice to a single sentence. These reward a fixed scan, not intuition — a correct sentence can feel awkward, and an incorrect one can sound perfectly natural.
Run the same seven checks in the same order every time:
- Boundaries. Is every clause joined by a period, semicolon, or comma + FANBOYS? Any conjunctive adverb doing a conjunction's job?
- Subject–verb agreement. Strip intervening phrases and match the true subject to the verb.
- Pronouns. Case (who/whom, I/me), number agreement with the antecedent, and an unambiguous antecedent.
- Verb tense and mood. Is the sequence logical? Does a verb of demand or recommendation trigger the subjunctive?
- Modifiers. Does each introductory phrase attach to the noun that follows the comma?
- Parallelism. Do items in a series and both halves of a correlative pair share a grammatical form?
- Idiom and comparison. Is each preposition the one the verb or adjective requires? Is the comparison between like things?
Decision rule: a sentence is correct when it survives all seven checks. Do not eliminate a sentence for being long, formal, passive, or unusually structured. None of those is an error, and options are frequently written to exploit the instinct that unusual equals wrong.
Which sentence joins its two independent clauses correctly?
A draft paragraph argues that a new bus rapid transit line succeeded. Which combination of the two facts below best supports that argument through subordination? Facts: (1) The line was built for half the projected cost. (2) The line carries 40,000 riders a day, double the forecast.
Which of the following sentences contains no error in Standard Written English?