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I'm doing a research on English modality (for reference I'm using F.R. Palmer's book "Modality and the English Modals").

In the book the author distinguishes between the three kinds of modality:

Epistemic modality (for possibility)

Deontic (for permission and obligation)

Dynamic (subject oriented "modality" i.e. objective potential)

To test the practical application of the theoretical points given in this book, I turn to native speakers' aid, but the issue is that everyone appears to have their own interpretations of modality in what seems to be the same context (some might understand a modal to be deontic (e.g. you have my permission to do that), while others understand it as dynamic (there is an objective possibility to do that).

To have a better understanding of what I mean, please, take a look at my thread on wordreference.com (particularly at the post #8, where I give a link to yet another one of my posts).

https://forum.wordreference.com/threads/can-will-be-able-to.3627055/

Only few people accepted the use of "can" there, but here (#1, Ex. 4) a similar example was validated:

https://forum.wordreference.com/threads/can-or-be-able-to-in-the-future.3626301/#post-1847635

There seems to be some misconception at play. This might be due to the fact that when we acquire language as children, we absorb it intuitively with no instructions. The language doesn't come in a package together with a user guide like a table from IKEA or some exhaustive grammar book explaining how our mind generates grammar. There's nothing to language but the language, so oftentimes we have to base our inferences on intuition. My objective here is to understand whether "can" is indeed not used to denote objective future possiby or is it just that the native speakers preceive "can" in my examples to be something else (e.g. permission or epistemic possibility).

Could you, please, check if my assumptions about the meaning of "can" in the following sentences are correct. If they are not, how would you interpret them?

Ex.1

A: What is this bank good for?! We all are jobless!

B: When Barclays opens a branch in our town, you [can / will be able to] apply for a job there ("B" merely states a fact about future possibility; "to be able to" is more naural here).

Ex.2

A: I need to find a job.

B: When Barclays opens a branch in our town, you can apply for a job there ("B" suggests a solution; in such situations "can" looks better. In the book this use of "can" is titled as "implication").

Thank you in advance!

  • Macmillan includes: << can modal ... There is no future tense [inflected form] of can, but will be able to is used for saying that someone will have the ability to do something or that something will be possible in the future, especially after a long time: ... She’ll be able to walk soon. ... A hundred years from now people will be able to visit Mars. 'Can' is usually used when planning or deciding about the near future: We can go shopping tomorrow. >> – Edwin Ashworth Oct 26 '19 at 12:00
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I think you have opened a 'Can' of worms here! (Sorry for the idiomatic reference). To answer your edit, "To be able to..." is used in more formal environments, whereas "Can", tends to be the more informal alternative. For example, I would use:

If doctor to patient: "Are you able to bend your knees?"

If mother to child (or perhaps nurse to patient): "Can you bend you knees for me?"

Can is a very complicated subject.

If Barclays [or any other bank for that matter] opens a branch "you can apply for a job there [if you want to... / you have the ability] The writer is suggesting that, in my opinion, you have the ability (permissive in this sense).

It could also be used informally / scoffingly in the negative: "You can apply for a job there if you want to!... With the subtext: But I would not [because its a terrible job!]"

From an information presentation style, I would normally put the pre-condition [When Barclays, open a branch] first, because the action [applying for the job] is conditional on this having happened first. If Barclays change their mind and don't open the branch, THEN you may not want, or be able to apply for a job elsewhere - at another branch. Therefore the permission is not required.

Equally, "If Barclays opens a branch in your town" - albeit highly unlikely in the present economic climate - it is also possible that you cannot [or can't] apply for a job there [because they are fully staffed / you are not qualified / you are only 6-years old...]

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    This usage has nothing to do with "giving permission". – Cascabel Oct 26 '19 at 9:15
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    Where is your evidence? – NeilB Oct 26 '19 at 10:13
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    can: /kan,kən/ verb 1. be able to. "they can run fast" 2. be permitted to. "you can use the phone if you want to" – NeilB Oct 26 '19 at 10:13
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    Cascabel, this is exactly the point! The underlying meaning of "can" in examples such as this always causes disagreement between the native speakers - some understand it to mean possibility, some - permission while others don't accept the use of "can" in this context at all. – Vsevolod IV Oct 26 '19 at 10:36
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    Most native speakers I know and have known (UK) would find 'When Barclays open a branch in our town, you can apply for a job there' used conversationally to convey either natural (ie epistemic) possibility ('will be able to') or permission (ie the deontic usage, 'are allowed to') totally acceptable. – Edwin Ashworth Oct 26 '19 at 11:49

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