Basics: Can and Could - Ability and Permission
Basics: Can and Could - Ability and Permission
The modal verbs can and could are essential for expressing what someone is able to do or allowed to do. We use can for present ability ("I can speak Spanish") and could to describe past ability ("I could run fast when I was younger"). They are also widely used to ask for, give, or deny permission, with could often acting as a more polite alternative to can ("Could I borrow your pen?" vs. "Can I go to the park?").
This challenge tests your understanding of these fundamental verbs in everyday contexts. You will explore scenarios involving past and present ability (such as a superhero's powers or a grandpa's youth), asking for and granting permission (like attending a concert or establishing roommate and house rules), and expressing inability or denial (like a spy who cannot reveal a secret).
You'll work through 12 questions in a variety of engaging formats, including single-choice, multi-choice, drop-down, and drag-and-drop.
Try the quiz to check your knowledge!
Modal Verb
English has the modal verbs can, could, may, might, must, shall, should, will, would, and also (depending on classification adopted) ought (to), dare, need, had (better), used (to). These do not add -s for the third-person singular, and they do not form infinitives or participles; the only inflection they undergo is that to a certain extent could, might, should and would function as preterites (past tenses) of can, may, shall and will respectively.
A modal verb can serve as the finite verb introducing a verb catena, as in "he might have been injured then". These generally express some form of modality (possibility, obligation, etc.), although will and would (and sometimes shall and should) can serve – among their other uses – to express future time reference and conditional mood.
Questions
Like many other Western European languages, English historically allowed questions to be formed by inverting the positions of verb and subject. Modern English permits this only in the case of a small class of verbs ("special verbs"), consisting of auxiliaries as well as forms of the copula be. To form a question from a sentence which does not have such an auxiliary or copula present, the auxiliary verb do (does, did) needs to be inserted, along with inversion of the word order, to form a question. For example:
- She can dance. → Can she dance? (inversion of subject she and auxiliary can)
- I am sitting here. → Am I sitting here? (inversion of subject I and copula am)
- The milk goes in the fridge. → Does the milk go in the fridge? (no special verb present; do-support required)
The above concerns yes-no questions, but inversion also takes place in the same way after other questions, formed with interrogative words such as where, what, how, etc. An exception applies when the interrogative word is the subject or part of the subject, in which case there is no inversion. For example:
- I go. → Where do I go? (wh-question formed using inversion, with do-support required in this case)
- He goes. → Who goes? (no inversion, because the question word who is the subject)
Note that inversion does not apply in indirect questions: I wonder where he is (not *... where is he). Indirect yes-no questions can be expressed using if or whether as the interrogative word: *Ask them whether/if they saw him*.
Negative questions are formed similarly; however if the verb undergoing inversion has a contraction with not, then it is possible to invert the subject with this contraction as a whole. For example:
- John is going. (affirmative)
- John is not going. / John isn't going. (negative, with and without contraction)
- Isn't John going? / Is John not going? (negative question, with and without contraction respectively)
Tag questions are formed with a special verb and pronoun subject: isn't it?; were there?; am I not?
Negation
A finite indicative verb (or its clause) is negated by placing the word not after an auxiliary, modal or other "special" verb such as do, can or be. For example, the clause I go is negated with the appearance of the auxiliary do, as I do not go. When the affirmative already uses auxiliary verbs (I am going), no other auxiliary verbs are added to negate the clause (I am not going). (Until the period of early Modern English, negation was effected without additional auxiliary verbs: I go not.)
Most combinations of auxiliary verbs etc. with not have contracted forms: don't, can't, isn't, etc. (Also the uncontracted negated form of can is written as a single word cannot.) On inversion of subject and verb (such as in questions), the subject may be placed after a contracted negated form: Should he not pay? or Shouldn't he pay?
Other elements, such as noun phrases, adjectives, adverbs, infinitive and participial phrases, etc., can be negated by placing the word not before them: not the right answer, not interesting, not to enter, not noticing the train, etc.
When other negating words such as never, nobody, etc. appear in a sentence, the negating not is omitted (unlike its equivalents in many languages): I saw nothing or I didn't see anything, but not (except in non-standard speech) I didn't see nothing. Such negating words generally have corresponding negative polarity items (ever for never, anybody for nobody, etc.) which can appear in a negative context, but are not negative themselves (and can thus be used after a negation without giving rise to double negatives).
English Grammar Basics
"English Grammar Basics" tag marks quiz and explainers that intend to provide a solid foundation in English language grammar. This includes all the major concepts and topics in English grammar, including nouns, verbs, adjectives, adverbs, prepositions, conjunctions, tenses, voice, mood, and sentence structure. The explanations we provide in quiz intro sections are clear and concise, making it easy for learners of all levels to understand. These quizzes are designed to be fun and engaging, helping you to retain the information more effectively. Whether you're a beginner or looking to refresh your knowledge, look for content marked with the "English Grammar Basics" tag for everything you need to master English language grammar.
A1 | Elementary | Beginners
CEFR A1 is the first level of the Common European Framework of Reference for Languages (CEFR), a widely used standard for measuring language ability. If you're just starting to learn English — or rebuilding from scratch — this is where you begin.
What can an A1 learner do?
At A1, you can handle the most basic, everyday communication. Specifically, you're expected to:
- Understand and use familiar everyday expressions — greetings, simple questions, common signs and instructions.
- Introduce yourself and others — say where you live, talk about people you know, describe things you have.
- Ask and answer simple personal questions — "What's your name?", "Where are you from?", "Do you have a car?"
- Have short conversations — as long as the other person speaks slowly and clearly and is willing to help.
What grammar does A1 cover?
A1 focuses on the building blocks of English grammar. You'll work with:
- Basic verb forms — the present tense of be, have, and do, plus simple regular and irregular verbs
- Simple sentence structure — subject + verb + object word order
- Common determiners and pronouns — a, the, this, my, he, she, it
- Basic prepositions — in, on, at, to, from
- Simple questions — yes/no questions and wh- questions (what, where, who)
- Everyday vocabulary and collocations — phrases that naturally go together, like make breakfast or do homework
How do you know if you're A1?
If you can read a short text like a menu or a bus sign, fill out a simple form with your personal details, and ask someone basic questions in English — you're operating at A1. If most of that still feels challenging, you're in exactly the right place.
Self-check: Try introducing yourself in five sentences — your name, where you're from, what you do, something you like, and one question for the other person. If you can do that (even with mistakes), you're solidly at A1.
What's next?
Once you're comfortable with A1 basics, you'll move toward A2, where sentences get longer, tenses expand, and you start handling more real-world situations.
To start practising, try these challenges: Are you A1/Beginner? Test your English CEFR Level!, "To be" in Present Tense, and Basics. Word Order..
Difficulty: Easy
Easy difficulty. Difficulty levels represent author's opinion about how hard a question or challenge is.