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Upload a PDF, slide deck or set of notes and get hard grammar questions with clear explanations for every answer. Start free with no credit card.

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Why hard grammar questions catch people out

Advanced grammar errors rarely look wrong at first glance. Subject-verb agreement across a distant or compound subject, the choice between who and whom, and dangling modifiers all pass a quick read. A difficult grammar quiz exposes exactly these gaps, which is why it is more useful than rereading a rules list.

Questions drawn from your own notes, not a generic question bank
Multiple-choice, true/false and short-answer formats in one generation
Explanations that name the rule behind each correct answer
Study in the browser on the free plan, with exports on paid plans

Example difficult grammar quiz questions

Which is correct: 'Neither the manager nor the employees were ready' or 'Neither the manager nor the employees was ready'?'Were ready'. With neither/nor, the verb agrees with the nearer subject, which here is the plural 'employees'.

Is 'between you and I' correct in a formal sentence?No, use 'between you and me'. 'Between' is a preposition, so it takes the object pronoun 'me'.

Complete the sentence: 'If I _____ you, I would apologize.' (was or were)'Were'. Hypothetical conditionals use the subjunctive, so 'were' is used even with 'I'.

Which sentence contains a dangling modifier: 'Walking home, the rain soaked me' or 'Walking home, I got soaked'?The first one. The phrase 'walking home' has no proper subject, since the rain is not the one walking.

True or false: 'Who' is used for the subject of a clause and 'whom' for the object.True. Test by replacing the pronoun with he or him; if him fits, whom is correct.

Generate the full set

Multiple-choice, true/false and short answer

Mix question types so you practice recognizing errors and writing corrections, not just guessing from patterns.

Explanations for every answer

Each question shows why the correct form works, so a wrong answer becomes a lesson on the rule it broke.

Built from your own material

Questions come from your course notes or textbook pages, so the difficulty matches what your class actually covers.

How it works

Upload your material

Add a PDF, DOCX, PPTX, plain text file or a photo of a page. Photos are read with text recognition.

Choose a question type

Pick multiple-choice, true/false or short answer, and generate a set aimed at the rules you are struggling with.

Take the quiz and review

Work through the questions, read the explanations for anything you missed, and retake the ones that stumped you.

DeckOwl reads your notes or slides and writes questions around the rules your course actually teaches. Each answer comes with a short explanation, so you learn the reason behind the correct form instead of memorizing it.

On the Plus plan you can export generated quizzes to PDF or DOCX for printing or offline review. Pro adds QTI 2.1 and Moodle XML export for teachers who run quizzes in a learning management system.

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Frequently asked questions

Which grammar rules cause the most mistakes on hard quizzes?

Subject-verb agreement with compound or distant subjects, who versus whom, and dangling modifiers cause most errors. Practicing sentences where these rules compete with intuition is the fastest way to improve.

How should I study when a grammar quiz keeps catching me out?

Write down the rule behind each missed question in your own words, then retake the same question type a day later. Spacing the review out makes the rule stick better than cramming one night.

Can I export my quizzes?

Exports are paid features. Plus at $39 per year or $7.99 per month includes PDF and DOCX export, and Pro at $14.99 per month adds QTI 2.1 and Moodle XML.

Is there a free plan, and do I need a credit card?

The free plan includes 3 generations per month with studying in the browser, and no credit card is needed to start. Students can get 40% off a paid plan with a school email.

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