"Shall I open the present now?"2. Shall is used in legal documents, in which it indicates a duty or responsibility: "This tenant shall obtain the landlord's permission before he makes any changes to the property."
Grammar rules formerly had the following formats which now are generally no longer utilized!
First person: I shall (s); we shall (pl)
Second person: you will (s); you will (pl)
Third person: he, she, it will (s); they will (pl)
First person: I will (s); we will (pl)
Second person: you shall (s); you shall (pl)
Third person: he, she, it shall (s); they shall (pl)
"The artificial distinction between shall and will to designate futurity has neither a basis in historical grammar nor the sound sanction of universal usage."
"Martin and Ernest will continue with the project, and they will complete it!"
Steve's father promised his son that he will complete writing the draft of his will today because he is afraid that he will put it off again. He really must will himself to concentrate on the task.