‘May’ vs ‘Can’: Understanding the Subtle Differences

Marcus Froland

Many of us have been there. You’re in the middle of a sentence, your confidence soaring, when suddenly you hit a roadblock. The words ‘may’ and ‘can’ stare back at you, and choosing between them feels like trying to solve a puzzle without all the pieces. It’s not just about permission or ability anymore; it’s about sounding right and making sense.

This struggle isn’t new. English learners and even native speakers grapple with these words every day. And why wouldn’t they? The nuances that separate ‘may’ from ‘can’ are subtle yet significant. But fear not, we’re here to shed light on this conundrum without leaving you hanging at the end of your sentence.

The answer lies just around the corner,

The words may and can often confuse English learners because they both suggest possibility. However, the main difference lies in their usage. May is used to express permission or to say that something is possible. For example, “You may leave the room now” means you have permission to leave. On the other hand, can is used to indicate ability or capacity. For example, “Can you swim?” asks if you have the skill to swim.

In short, use may for permission or possibility, and can for ability or capacity. Remembering this key difference will help you use these words correctly in your sentences.

Exploring the Historical Context of ‘May’ and ‘Can’

The history of modal verbs can be traced back several centuries, particularly in the case of ‘may’ and ‘can’. Understanding the evolution of these verbs and their historical use helps illuminate the origins of the prescriptive rule that separates their meanings as they pertain to permissions and abilities.

‘May’ made its debut in the English language as early as the 8th century, initially signifying strength or power. Over time, it quickly adopted meanings closer to those of permission, ability, and possibility, all of which were regularly used before 1000 AD. In contrast, ‘can’ came into play around 1300, with meanings that soon encompassed both knowledge and ability, eventually leading to semantic overlaps with ‘may’.

By 1500, both verbs were being used to denote ability and possibility. However, it took until the late 1800s for ‘can’ to start expressing permission. This overlap led to the formation of a prescriptive rule that attempted to delineate ‘can’ for ability and ‘may’ for permission. Heavily propagated in the 1920s, this distinction persists in some teachings today, even though it lacks substantial justification.

The prescriptive rule separating ‘can’ for ability and ‘may’ for permission is a product of historical use rather than any grammatical necessity.

To better grasp the roles these modal verbs played in the past, let’s take a closer look at their evolution:

Modal Verb Initial Meaning Later Meanings
May Strength or Power Ability, Possibility, Permission
Can Knowledge Ability, Permission
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Although ‘may’ and ‘can’ have distinct historical roots, their shared meanings in the realm of permission and ability have invited confusion and contention over the years. With this historical context in mind, it is essential to acknowledge that the relationship between these two modal verbs is the product of an ever-evolving linguistic landscape.

The Modern Usage of ‘May’ for Permission and Possibility

Today, ‘may’ is frequently selected for formal situations or when one desires to be particularly correct or deferential. It expresses higher degrees of politeness and formality in granting permission, such as “You may leave the room,” and in discussing possibilities that are probable, like “I may join you for dinner.”

When Is It Appropriate to Use ‘May’?

In contemporary language, the appropriate use of modal verbs such as ‘may’ surfaces in a variety of contexts. As a courteous expression preferred for formal requests, ‘may’ is generally employed when seeking consent or approval in a respectful manner. Moreover, it conveys politeness and subtle authority when granting permission.

“May” is a versatile modal verb used for expressing possibility, granting permission, and making formal requests with an emphasis on polite language.

  • Permission: “You may enter the building now.”
  • Possibility: “She may be arriving late.”
  • Polite request: “May I have a moment of your time?”
  • Formal approval: “You may proceed with your presentation.”

Examples of ‘May’ in Formal Requests

Formal requests often opt for ‘may’ over ‘can’ as it carries a more polite tone. The following example sentences highlight ‘may’ as a respectful choice when seeking consent or approval in a formal context:

  1. “May I have your attention, please?”
  2. “May I borrow your book?”
  3. “May we reschedule the meeting for next Wednesday?”
  4. “May I assist you with the luggage?”

How ‘Can’ Evolved to Express Ability and Informal Permission

The evolution of the word ‘can’ has an intriguing path, with the modal verb transforming from a term signifying knowledge to a marker of both ability and informal permission. Today, ‘can’ holds its place as the dominant modal verb signifying capacity. In the modern language, alongside ‘may,’ it serves as a means to express possibilities and casual consent. Let’s explore the journey ‘can’ has taken throughout history and how it gained its current uses.

The origins of ‘can’ trace back to meaning “to know” or possess knowledge of something. Over time, its meaning shifted into the realm of possessing the skill to perform a task or action. For instance, “I can swim” implies having the ability to perform the action of swimming. This latter use, which is less prevalent in written literature due to its informal nature, might actually be more predominant in spoken language.

“Can you pass me the salt?” – An example of using ‘can’ to ask for informal permission.

Now, while ‘can’ continues to be the standard choice for expressing ability, it has also become a suitable choice for asking for informal permission. In everyday conversations, native English speakers often interchange ‘can’ with ‘may’ when seeking casual consent from someone, e.g., “Can I use your phone?” Although some purists may argue that ‘may’ is the correct choice for requests, the use of ‘can’ in this context is widely accepted and understood.

  1. Using ‘can’ for expressing abilities: “She can play the piano.”
  2. Using ‘can’ for informal permission: “Can I sit here?”
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‘Can’: Ability ‘Can’: Informal Permission
I can drive a car. Can you open the window, please?
He can solve complex math problems. Can I have a slice of cake?
She can speak three languages. Can you pass me the remote control?

As the English language continues to evolve, the usage of modal verbs like ‘can’ and ‘may’ in everyday conversations reflects the changing dynamics of language. Although traditional grammar rules may prefer ‘may’ over ‘can’ when asking for permission, it’s essential to recognize that language adapts to how people communicate. The use of ‘can’ to express ability and informal permission only emphasizes the versatility of this modal verb in modern language.

The Interchangeability of ‘May’ and ‘Can’ in Today’s Language

In contemporary English, the interchangeable use of ‘may’ and ‘can’ is more commonly accepted, especially in informal contexts. While their historical origins and usage may differ, both modal verbs effectively fulfill functions of granting permission or expressing ability. The choice between using ‘may’ or ‘can’ largely depends on the desired level of formality, and it is essential to make mindful decisions that suit your audience and context.

Generally, ‘may’ is prevalent in more formal and polite situations when requesting permission. For example, in a professional setting, it is appropriate to use ‘may’ when addressing your supervisor, such as “May I contact the client about the project?” On the flip side, ‘can’ is seen as less formal and more suited for casual conversations with peers, such as asking, “Can you pass me the salt?”

Keep in mind that while both ‘may’ and ‘can’ may be used in various ways, the primary distinction lies in the perceived level of formality. ‘May’ conveys a degree of respect and courtesy, while ‘can’ seems more casual and standard. Ultimately, as language constantly evolves, it is essential to pay attention to how these two modal verbs intersect in expressing permission and ability in different contexts. Analyzing your audience and adapting your language accordingly will ensure that your use of ‘may’ and ‘can’ remains relevant and suitable in any given situation.

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