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Inchoateknowledge Posted 20 years ago
Grammar

proform

In the words of Randolph Quirk: "As a permission auxiliary, may is more formal and less common than can, which (except in phrases such as if I may) can be substituted for it."

What is the antecedent of 'it'? It is 'may', is it not?
So, 'can' can be substituted for 'may'.
It is clear so far.

If I say 'can' can substitute for 'may' it means 'can' may take the place of 'may'.
Clear.

If I use passive: "'can' can be substituted for 'may'." then the object takes the place of the agent: 'may' may take the place of can = 'can' can be substituted for 'may'.
Clear.

But then, this proposition is not reconciliable with what is written within the brackets: "except in phrases such as if I may"

"except in phrases such as if I may" It suggests to me 'can' can not always take the place of 'may'.

The original sentence is opaque to me.

question: if I am wrong, from where is my reasoning bleeding?

'can' can not always take the place of 'may' and 'may' may take the place of 'can'
These facts are reconciliable, but I can not catch the thread of thought of the sentence.

'may' may take the place of 'can' (except in phrases such as if I may) ????
  

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18 Answers
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Read again, I have made alterations in the text.
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For permission:

Can/May I go to the ball?

If I may speak...

*If I can speak...

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InchoateknowledgeIn the words of Randolph Quirk: "As a permission auxiliary, may is more formal and less common than can, which (except in phrases such as if I may) can be substituted for it."

What is the antecedent of 'it'? It is 'may', is it not?
So, 'can' can be substituted for 'may'.
It is clea
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Hello IK, your question confused me so much!
InchoateknowledgeIn the words of Randolph Quirk: "As a permission auxiliary, may is more formal and less common than can, which (except in phrases such as if I may) can be substituted for it."

What is the antecedent of 'it'? It is 'may', is it not?
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FeathersHello IK, your question confused me so much!
InchoateknowledgeIn the words of Randolph Quirk: "As a permission auxiliary, may is more formal and less common than can, which (except in phrases such as if I may) can be substituted for it."

What is the antecedent of 'it'?
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http://dictionary.cambridge.org/define.asp?key=79491&dict=CALD


to use something or someone instead of another thing or person:

Dayton was substituted for Williams in the second half
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MilkyFor permission:

Can/May I go to the ball?

If I may speak...

*If I can speak...


This was not my question.
anyway, thank you.

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As a permission auxiliary, may is more formal and less common than can, which (except in phrases such as if I may) can be substituted for it.

As a permission auxiliary, may is more formal and less common than can. Can can be substituted for it/may, except in phrases such as "if I may".
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<You can substitute oil for butter in this recipe.
Does it say if you do not have butter you can use oil?>

Yes, And, if you are allergic to butter or prefer oil for any reason, you can substitute one for the other.
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Inchoateknowledge As a permission auxiliary, may is more formal and less common than can, which (except in phrases such as if I may) can be substituted for it.
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