4

He hasn't told his boss that he won't be coming back after his vacation

John won't be driving to work any more after his arrest for being drunk at the wheel.

why not won't come and won't drive, it is something that is definitive not temporary or is the progressive here to show that it is temporary, that in the first case he will return one day to work and the second case his suspension has a limitation

2

The reason that we use future progressive is explained in this article:

The simple future is used ... In the negative form, to express unwillingness:
The baby won't eat his soup.
I won't leave until I've seen the manager!

If something isn't going to happen due to external factors rather than due to unwillingless, we use the future progressive even if the verb clearly relates to a single action.

  • thanks for your clear explination, now I have understood – user5577 Jul 10 '18 at 15:52

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