You must obey the rules of the office.

[Pg 12]Ought which is sometimes confounded with must in phrases of this sort expresses moral obligation as distinguished from necessity.

You ought to obey the rules of the office,

indicates that it is your duty to obey because it is the right thing to do even though no penalty is attached.

You must obey the rules of the office,

indicates that you will be punished if you do not obey.

Those forms of the verb which express the time of the action are called tenses. No particular difficulty attends the use of the tenses except in the case of shall and will and should and would.

Shall and will are used as follows: In simple statements to express mere futurity, use shall in the first person, will in the second and third; to express volition, promise, purpose, determination, or action which the speaker means to control use will in the f. . . Read More