Subordinating Conjunctions Worksheet
I spend more time fixing bad worksheet design than actually teaching from them. Most of the stuff out there treats subordinating conjunctions like a vocabulary memorization task, which defeats the entire purpose. The word itself gives you almost nothing about how the structure actually functions in a sentence. Here's what I've learned after going through this with enough students to fill a classroom. A subordinating conjunction is a word or phrase that links a dependent clause to an independent clause. That's the textbook definition. The real skill is knowing which clauses can stand alone and which cannot, and understanding how the relationship between them shifts meaning. Words like because, although, since, while, if, when, unless, and until are the common ones, but the category also includes compound subordinators like in order that, even though, and as long as. Most worksheets ignore the compound ones entirely, which leaves students underprepared for anything beyond basic grammar. I had a student last year who could correctly identify "although" and "because" in isolation but wrote sentences like "Although I was tired, but I kept working." That kind of error doesn't show up on fill-in-the-blank worksheets with single-word answers. It only surfaces when you force people to generate their own sentences or combine clauses on their own.
How to Approach a Subordinating Conjunctions Worksheet Effectively
The method that actually works is reverse engineering. Start with compound sentences and break them down, rather than starting with blank conjunction slots. Take something like "I was tired, but I kept working" and ask students to replace "but" with a subordinating conjunction while restructuring one clause into a dependent position. The answer "Although I was tired, I kept working" requires them to understand that "although" cannot coexist with "but" and that the comma placement changes depending on which clause comes first. Here's a specific workflow I use: First, have students list every subordinating conjunction they know without any context. This exposes the gaps immediately. Most people can only name about eight or nine before running dry. The ones they can't recall under pressure are the ones they'll struggle with in actual writing.
Second, give them independent clauses and dependent clauses separately and ask them to pair them logically. Not grammatically correct — logically sound. "While I was studying, the power went out" is grammatically fine but narratively odd in most contexts. That distinction matters for higher-level writing. Third, practice punctuation rules around the conjunctions. When the dependent clause comes first, use a comma. When it comes second, usually don't. The exceptions exist but are rare enough that a student learning this for the first time shouldn't wrestle with them yet. Keep it simple until the pattern sticks.
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Common Subordinating Conjunction Categories and Their Use Cases
Time-based conjunctions include after, before, when, while, since, until, and as soon as. Cause and effect uses because, since, and so that. Condition relies on if, unless, provided that, and as long as. Contrast or concession covers although, even though, while, and whereas. Purpose uses so that and in order that. Reason is typically because or since, though "since" also functions as a time marker, which creates genuine ambiguity that tests should either avoid or lean into deliberately. I once designed a Subordinating Conjunctions Worksheet where a question asked students to complete "______ it was raining, we went outside anyway" and the intended answer was "Although." A student marked "Though" and the answer key rejected it. "Though" functions identically here. That's a poorly designed key, not a poor student answer. It happens constantly in these materials.
What to Look for When Selecting or Designing One
Most free worksheets online fall into three bad categories. The first is the fill-in-the-blank variety with twelve questions and five answer choices provided in a word bank. These test recognition, not production. The second is the sentence combining exercise that still only has one correct structural answer per item, ignoring the fact that English allows multiple valid combinations. The third is the overly simplified version that only covers because, when, and if, which is useful for beginners but useless for anyone past eighth grade level. A good worksheet includes sentence combining with multiple possible correct answers listed as acceptable. It includes error identification where students find the misused conjunction or the incorrect punctuation. It includes a short writing prompt that requires at least two subordinating conjunctions in context. And it includes a section that distinguishes between conjunctions that look identical but function differently, like "since" as a time marker versus "since" as a causal marker. One thing most people miss: subordinating conjunctions and coordinating conjunctions get confused constantly. "For" functions as a coordinating conjunction (FANBOYS), but "because" is subordinating. Students will write "I stayed home, for I was sick" and it's technically correct but archaic in tone, while "I stayed home because I was sick" is both correct and modern. Teaching the difference matters less than teaching that the structural relationship is what defines the category, not just the word itself.
A Practical Example Set
Here's a section you could pull from or adapt: Combine the following pairs using an appropriate subordinating conjunction. 1. I finished the report. My boss was impressed. (Answer: Because I finished the report, my boss was impressed. OR My boss was impressed because I finished the report.)
2. She studied hard. She failed the exam. (Answer: Although she studied hard, she failed the exam. OR She failed the exam although she studied hard.) 3. We will leave early. Traffic is bad. (Answer: We will leave early unless traffic is bad. OR We will leave early if traffic is not bad.) Identify the error.
4. Because I was late, but I still made it. (Error: "Because" and "but" cannot both appear. Correct: Although I was late, I still made it. OR I was late, but I still made it.) 5. While I was cooking and he was cleaning, the phone rang. (Acceptable but ambiguous: the comma placement makes it unclear whether the phone rang during both activities or after them. Cleaner: While I was cooking and he was cleaning, the phone rang. Then ask students to rewrite without the comma splice potential.)
Where These Worksheets Fall Short
They don't teach register. A student might correctly use "whereas" in a worksheet and then use it in a text message to a friend, which sounds stilted. They don't address the comma splice problem that arises when students treat subordinating conjunctions like coordinating ones. And they rarely cover the marginal cases like "during the time that" or "the fact that," which function similarly but aren't in the standard word lists. If you're using a Subordinating Conjunctions Worksheet as your primary teaching tool, pair it with actual reading and writing. The worksheet builds the mechanic. The application builds the skill. I also recommend having students underline the subordinating conjunction in published prose once they've grasped the basics. Watching how professional writers use "while" to signal contrast rather than time, or how "since" carries causal weight in academic writing, collapses the artificial boundary between the grammar exercise and real language. That gap is where most learners stall.
