Was vs were is one of those grammar questions that feels simple until you hit a sentence like "If I was you" or "I wish it were over." Both forms are past tenses of the verb "to be," but they aren't interchangeable. The choice depends on who or what the subject is, how many subjects there are, and whether the sentence describes something real or hypothetical.
The basic rule: singular vs plural
In ordinary past-tense statements, the split is clean. Was goes with first-person singular and third-person singular subjects. Were goes with everything else.
- I was tired. (first-person singular)
- She was late. (third-person singular)
- You were right. (second-person singular and plural)
- We were there. (first-person plural)
- They were confused. (third-person plural)
Notice that "you" always takes "were," even when you're addressing one person. That's a quirk of English that trips up non-native speakers, but native speakers rarely get it wrong in these basic cases. The real trouble starts with conditional and hypothetical sentences.
The subjunctive mood: why "were" appears with singular subjects
English has a grammatical form called the subjunctive mood, used for wishes, hypotheticals, and conditions that aren't true. In the subjunctive, "were" replaces "was" for all subjects, including singular ones. This is where most was vs were confusion actually lives.
Consider these two sentences:
If I was taller, I played basketball better. (This doesn't make sense as written.)
If I were taller, I would play basketball better. (Hypothetical, so subjunctive applies.)
The second sentence describes something that isn't true: the speaker isn't taller. Because the condition is contrary to fact, "were" is the correct choice, even though the subject is "I." The same logic applies to "she," "he," and "it."
A few reliable tests for when to use "were" with a singular subject:
1. Wishes. "I wish it were Friday" uses "were" because Friday hasn't arrived yet. The wish describes an unreal present state.
2. Conditions contrary to fact. "If he were honest, this would go faster" signals the speaker doubts he is being honest.
3. Suggestions and proposals. "The committee suggested that she were present" is slightly archaic, but in formal writing, "that she be present" is more standard. This overlaps with another subjunctive form.
When "was" is correct in conditional sentences
Not every "if" sentence calls for "were." If the condition described could actually be true, "was" is fine.
"If she was at the party, she would have seen him." This doesn't assert she wasn't at the party. The speaker is uncertain, not describing a counterfactual. So "was" fits perfectly well here.
The test is simple: is the condition definitely untrue or purely imaginary? Use "were." Is it uncertain, possible, or factual? Use "was."
Common phrases that always use "were"
A handful of fixed expressions use "were" regardless of context. Recognising them saves time:
- As it were: a phrase meaning "so to speak," used to signal a figurative statement. "He was, as it were, the engine of the group."
- Were I to...: a formal conditional construction. "Were I to leave now, they'd notice."
- If I were you...: advice phrased as a hypothetical. The speaker isn't actually the other person, so the subjunctive applies.
All three constructions appear in formal writing, fiction, and educated speech. Getting them right signals grammatical precision, the kind covered in detail in pieces like sang vs sung, where a similar past-tense verb distinction causes its own confusion.
Informal speech vs formal writing
In everyday speech, "was" increasingly appears where "were" is technically correct. "If I was in your position, I'd quit" is common and widely understood, even if the subjunctive purist would insist on "were." Most style guides, including The Chicago Manual of Style, still recommend the subjunctive "were" in formal writing, while acknowledging that spoken English has drifted.
For academic work, professional documents, and any formal context, stick with "were" for hypotheticals. For casual writing, the distinction matters less, though using it correctly never hurts.
Quick reference: was or were?
The decision tree is short. First, identify the subject. If it's plural or "you," use "were." If it's singular (I, he, she, it, a single noun), ask whether the sentence is hypothetical or contrary to fact. Yes: use "were." No: use "was."
This mirrors a broader pattern in English where the grammatical form of a verb changes based on mood and not just tense, something that also shows up in use vs usage and similar questions about how slight differences in form carry distinct grammatical weight.
One more thing worth fixing early: "was" never works in the expression "if I were you." That sentence describes a pure fiction. It's always "were," in every register, in every style guide, with no exceptions.