shall

Modal Auxiliary Verbs - Shall

• Shall" is a modal verb used to indicate future action.
• We use it mostly with I and we
• shall usages
• shall is used to make suggestions using I and we
•  You see an old man is carrying heavy bags.
  you:Shall I help you carry your bags?
• shall is used to make offers using I and we
• Shall I make you a coffee?
• shall’ used to describe formal  obligations
• Applicants shall provide self attested copies of their certificates to prove their qualification
• Employees shall provide a medical certificate for sick leave.
• you shall abide by the law.
• There shall be no trespassing on this property.
• Students shall not enter this room.
• to indicate future action(formal situations)
• I shall be replaced by someone from the Head office.
• I shall be there by 8:00. 
• to make promises
• There's no need to worry. I shall never forget you.
• I shall never give up the fight for freedom. 
• inevitability
• Man shall explore the distant regions of the universe.
• We shall overcome oppression. Man shall never give up the exploration of the universe.

• 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.)
• Warning:
• We use shall only with I and we to make predictions or express intentions:
• The new office will be ready at the end of the year
• Not: The new office shall be ready at the end of theyear
• Important
• In very formal contexts, we use shall to give commands:
• This door shall be kept closed at all times.