Modal Auxiliary_ will

• "Will" is a modal verb used with promises , voluntary actions or predictions that take place in the future.
• Promises
• I promise that I will write you every single day
• voluntary actions
• I will send you the information when I get it.
• "Will" can also be used to talk about what is going to happen in the future, especially things that you are certain about or things that are planned:
• Clare will be five years old next month.
• The train leaves at 8:58, so we'll be in Scotland by lunchtime.
•  used to ask someone to do something:
• Will you give me her address?
• Will you give that to Tony when you see him, please?
•  used in conditional sentences with 'if':
•  If he's late again, I'll be very angry.
• I'll wait with Christopher if his mother isn't here when you go.
• WILL/OR SHALL
•  The traditional rule is that shall is used with first person pronouns (i.e. I and we) to form the future tense, while will is used with second and third person forms (i.e. you, he, she, it, they). For example:
• I shall leave for Chicago tomorrow.
• We shall discuss the matter with the chairman.
• The train will leave at 9.40 pm.
• He will be back in a day or two.
•  However, when it comes to expressing a strong determination to do something, the roles are reversed: will is used with the first person, and shall with the second and third. For example:
•  I will go there, whatever happens. (Determination)
• We will not let you go. (Determination)
• Shall can be used with second and third person pronouns to express a command.
• You shall not lie. (= You are commanded not to lie.)
• She shall obey my orders. (= She is commanded to obey my orders.)
• He shall go at once. (= He is commanded to go at once.)
• to express a threat.
• You shall regret this.
• They shall pay dearly.
• Shall may also express determination.
• You shall apologize. (= You will be obliged to apologize.)
• We use Will you … ? or Would you … ? to make requests:
• Will you carry this for me, please?
• Would you please be quiet?
• But would you is more polite