Resume Grammar Checker: Fix Errors Before You Apply
Grammar errors on a resume signal carelessness to recruiters — and they silently reduce your ATS keyword density when vague phrasing replaces precise terminology. This guide covers the most common resume grammar mistakes, how to fix passive voice, and the tense rules that every resume should follow.
Tense rules by resume section
Inconsistent tense is the most common grammar mistake on resumes. The rule is simple: past tense for completed work, present tense for current work and your summary.
| Section | Tense | Example |
|---|---|---|
| Current job bullets | Present tense | Lead a team of 6 engineers |
| Past job bullets | Past tense | Led a team of 6 engineers |
| Professional summary | Present tense | Backend Engineer with 5 years… |
| Certifications section | Past tense (when obtained) | Completed AWS certification in 2024 |
| Education dates | Past tense | Graduated May 2021 |
Fix passive voice — 6 direct rewrites
Passive voice hides your ownership of work. Replace every instance with a strong action verb. Here are the six most common passive constructions and their active replacements:
| Passive (before) | Active (after) |
|---|---|
| Was responsible for managing… | Managed… |
| Was involved in the development of… | Built / Developed… |
| Helped with the implementation… | Implemented… |
| Was tasked with leading… | Led… |
| Was part of the team that delivered… | Delivered… |
| Assisted with the rollout… | Contributed to the rollout of… |
6 common resume grammar errors — and exact fixes
Inconsistent verb tense
Wrong: Led product launches and manages daily standups (same role)
Fix: Use past tense for all bullets in completed roles, present for current role only.
Passive voice
Wrong: Was responsible for increasing sales by 20%
Fix: Increased sales by 20% through targeted outbound campaigns.
First person pronouns
Wrong: I managed a team of 8 engineers and I improved deployment time.
Fix: Managed a team of 8 engineers. Reduced deployment time 40% using CI/CD.
Misspelled tool names
Wrong: Phython, JavaScripts, Node JS, AWS Lamda, Power Bi
Fix: Python, JavaScript, Node.js, AWS Lambda, Power BI
Wordy phrasing
Wrong: Utilized a wide variety of different technical methodologies
Fix: Applied Agile, Kanban, and Scrum frameworks
Clichés and filler
Wrong: Results-driven professional with excellent communication skills
Fix: Remove or replace with a specific claim backed by a metric.
Resume proofreading checklist
Run through this checklist before submitting every application:
- ✓All bullets in completed roles use past tense
- ✓Current job bullets use present tense
- ✓No first-person pronouns (I, my, me)
- ✓No passive voice ('was responsible for')
- ✓Every tool name is spelled correctly (Python, JavaScript, AWS Lambda)
- ✓No clichés ('results-driven', 'team player', 'excellent communication')
- ✓No contractions (don't, I've, they're)
- ✓Summary is written in present tense
- ✓Bullet points all start with action verbs
- ✓File tested in ATS checker after final edit
Check grammar and ATS score at the same time
Our ATS checker flags keyword issues, weak bullets, and formatting problems in the same scan. Fix grammar first, then verify your score.
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Frequently asked questions
What grammar mistakes are most common on resumes?
The top five are: inconsistent verb tense (mixing present and past across the same role), passive voice ('was responsible for' instead of 'Built'), wordiness ('utilized' instead of 'used'), missing articles, and spelling errors in tool names (e.g., 'Phython' instead of 'Python'). These weaken both ATS parsing and recruiter impression.
Should resume bullets be written in past or present tense?
Past tense for all completed roles — even if the content feels ongoing. Present tense only for your current job. Mixing tenses in the same role is a red flag that signals careless proofreading to recruiters.
Does grammar affect my ATS score?
Indirectly. ATS systems do not grade grammar, but poor grammar obscures keywords. If a bullet reads 'Responsible for the development of Python-based tooling' instead of 'Built Python automation tools', the keyword density and clarity both suffer. Clean grammar helps ATS extract the right terms.
How do I fix passive voice on a resume?
Replace 'was responsible for' with a specific action verb. Replace 'was involved in' with Led, Built, Managed, or Contributed to. Replace 'projects were delivered' with 'Delivered 12 projects on schedule'. Each fix should add a subject (you) doing the action.
Should I use first person ('I') on a resume?
No. Resumes use implied first person — bullets begin with action verbs, never 'I'. Correct: 'Led a team of 8 engineers.' Incorrect: 'I led a team of 8 engineers.' First-person pronouns make the resume wordy and are considered unprofessional.
What is the correct tense for a summary section?
Present tense for the summary, since it describes who you are right now. Example: 'Backend Engineer with 5 years building scalable APIs in Node.js.' Past tense only appears in specific achievements within the summary, such as 'reduced deployment time 60%.'
Can I use contractions on a resume?
No. Contractions (don't, I've, they're) are informal and out of place on professional documents. Use full forms in the rare case you write a sentence-style description, and prefer bullet points with no connectives at all.
How do I proofread a resume effectively?
Four steps: (1) Read it aloud — you catch awkward phrasing faster. (2) Read it backwards, sentence by sentence — forces you to evaluate each line in isolation. (3) Check every proper noun spelling — company names, tool names, certification names. (4) Run the resume through the ATS checker after edits to verify keyword integrity wasn't affected.