Does vs can

[kingston_123]

When does class begin tomorrow?
When can class begin tomorrow?

Please tell the difference in meaning between these two sentence.

 

[tedmc]

1. When is class scheduled/due to begin tomorrow?
2. When is it possible for class to begin tomorrow?

The time for 1 has been fixed while the time for 2 has not been fixed but is to be arranged.

 

[GoesStation]

When does class begin tomorrow?
When can class begin tomorrow?

Please tell me the difference in meaning between these two sentence.

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