Can vs. May
Sometimes, we are confused about words that are similar because of how our language changes over time. What was an unacceptable use of a word a few decades ago may actually be widely accepted today. Can and may are two modal verbs that are often used interchangeably. While this is widely accepted today, it was not always the case. Let's take a closer look at these two verbs.
Can is a verb that means to be able to do something. Can implies ability.
1. Jessica can do a backflip.
2. Mrs. Jones can call our mothers if we do not behave in class.
3. Mom says I can go to the party if I clean my room.
4. Can you help me with number 57?
May is a verb that denotes a possibility or asks for permission. May does not imply ability; instead, it implies possibility or asks for permission.
1. May I use the restroom?
2. We may go to the football game tonight.
3. Jessica may be able to do a backflip; I am not sure.
4. May I ask for your help with number 57?
Many people today would say that it's okay to use can instead of may when asking for permission.
1. Can I use the restroom?
2. Can I ask for your help with number 57?
While everyone would know what you mean if you use can in these sentences, in a strict sense, these sentences are incorrect.
So, the best advice for you is to use your best judgement. In informal writing or in conversation with friends, it might be okay to use can when asking permission. However, in formal writing or in a situation where you need to show politeness, it is best to stick with may.
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