Verb Tenses in a Research Paper, Section by Section

A supervisor circles four sentences in a results paragraph and writes one word in the margin: tense. Every verb in the paragraph reports a finding that already happened, except one sentence that drifts into the present, as if the numbers were still arriving.

That single verb is worth pausing on, because a research paper is not written in one tense throughout, and most writers know that in the abstract without being able to say exactly which tense belongs where. The question of what tense should the methods section be in trips up even careful writers first, because the answer differs from the tense the rest of the paper defaults to. The short version is a table. The longer version, section by section, is the rest of this piece.

The Section-by-Section Tense Table

Here is the convention followed across most empirical papers, endorsed directly by APA Style's own guidance on verb tense. Treat it as the default, then check your own field's house style or a specific journal's author instructions before assuming it is universal.

Section	Typical tense	Why
Abstract	Past for what was done, present for what it means	Reports a completed study, then states a standing conclusion
Introduction	Present for established knowledge, past for a specific prior study	Established facts are treated as still true, one study is a finished event
Literature review	Past, or present perfect for research that is still ongoing	Marks a finished study versus a body of research still accumulating
Methods	Past	Describes what you did, as a sequence of completed steps
Results	Past	Reports what was found, not what is found
Discussion	Present	Interprets what the results mean, as a claim that holds now
Conclusion	Present	States the paper's standing claim, not a historical event

Tense consistency is a narrower problem than the one TextPulse's guide to humanizing academic writing section by section covers, but it sits right next to it: a paper that drifts in tense reads as unedited the same way a paper with flattened sentence rhythm reads as generated.

Abstract and Introduction: Setting Up Two Different Timelines

An abstract almost always mixes two tenses on purpose. "This study examined how sleep duration affects recall" is past tense, because the study is a finished event. "The results suggest that timing matters more than duration" is present tense, because a finding is reported as a standing claim, not something that was only true once. Writers who flatten an abstract into one tense usually default to the past throughout, which quietly turns a live finding into a historical curiosity.

The introduction runs on a similar split, at a different scale. General, established knowledge takes the present tense: "sleep deprivation impairs working memory" is a fact a reader can rely on today. A specific earlier study takes the past tense, because it names a bounded, completed event: "Walker (2020) tested this in a sample of 40 adults." Mixing the two the wrong way round is one of the more common signals that a writer hasn't yet distinguished a fact from the study that produced it.

Why the Literature Review Splits Between Past and Present Perfect

The literature review is where the past tense and the present perfect genuinely compete, and APA's own guidance gives both as options for exactly this section, with different jobs. "Martin (2020) addressed this question directly" is past tense: one study, one finished action, done. "Researchers have studied this question extensively" is present perfect: it points at an accumulated body of work rather than a single finished study, and treats that body of work as still open as far as the field is concerned.

The test that actually resolves which one to use is whether you are pointing at a single, closed study or a pattern across several still-active ones. The past tense takes almost without exception a single finding from one paper. Where the present perfect earns its place is with a claim about the field's overall trajectory, or a research question that current work is still chasing. Swapping the two is the single most common tense error a careful supervisor will actually mark.

What Tense Should the Methods Section Be In?

Past tense, almost without exception. "Participants completed a survey" and "samples were centrifuged at 3,000 rpm" both describe a sequence of steps that happened once, in a specific order, and are now finished. APA's own guidance gives exactly this kind of example, describing a procedure in the past tense, because a method section reports what you did, not a standing description of what you always do.

The one carve-out is a sentence that compares your approach to the field's, rather than narrating your own steps: "others have used similar sampling approaches" is present perfect, because it describes an ongoing pattern across multiple studies rather than the one specific thing you did on this occasion. That sentence is doing a literature review's job inside a methods section, and it borrows that section's tense along with it.

Results in the Past, Discussion in the Present

This is why results remain in the past tense: "scores decreased significantly" and "the intervention group outperformed the control group." These statements are reporting what was measured once, and now make up a finished fact about this set of data. A results section that drifts into the present ("scores decrease significantly") reads as if the experiment is still ongoing, which isn't usually what the writer intends to say.

Discussion flips to the present tense because its job changes: it interprets, rather than reports. "The results indicate that timing matters more than duration" and "these findings mean that current guidance may be incomplete" both treat the interpretation as a claim that holds now, at the moment a reader encounters it, rather than something that was only true during the study. A conclusion keeps that same present tense for the same reason: "we conclude that further replication is needed" is a standing claim, not a historical report.

Keeping a Consistent Tense Within Each Paragraph

APA's guidance on verb tense is blunt about the rule that matters more than any single section's default: use a chosen tense consistently throughout the same and adjacent paragraphs. Switching tense mid-paragraph disrupts a reader more than picking the theoretically ideal tense for one isolated sentence ever could.

A general grammar checker will not catch this kind of drift, because every sentence is still grammatically correct on its own. A grammar checker is built to flag agreement and punctuation, not to track a timeline across paragraphs, so a sentence that quietly slides from past to present passes every ordinary check without a flag.

TextPulse's free verb tense checker is built for exactly that gap: it reads a passage section by section and flags a sentence whose tense breaks from what the rest of its paragraph is doing, which is faster than rereading a fifteen-page draft by eye looking for drift across paragraphs written on different days.

Tense consistency is one mechanical piece of a larger job. When a whole draft needs more than its verbs fixed, TextPulse's AI humanizer works at the sentence and paragraph level across the full document rather than one flagged line at a time.

The discussion section is where tense choices get least mechanical, and it has a page of its own. For a whole document rather than one section, humanizing a thesis is treated separately.

None of this is pedantry for its own sake. A reader tracks a paper's argument partly through its tenses without noticing they are doing it, and a section that quietly shifts timeline hands the reader work they should never have to do: figuring out what already happened and what is still true. Get the tense right and that work disappears before anyone notices it was there.