English verb conjugation
SHALL DECREASE

Regular verb: decrease - decreased - decreased

Affirmation

Simple form	V-ing form
I shall decrease you shall decrease he shall decrease we shall decrease you shall decrease they shall decrease	I shall be decreasing you shall be decreasing he shall be decreasing we shall be decreasing you shall be decreasing they shall be decreasing
Perfect	V-ing perfect
I shall have decreased you shall have decreased he shall have decreased we shall have decreased you shall have decreased they shall have decreased	I shall have been decreasing you shall have been decreasing he shall have been decreasing we shall have been decreasing you shall have been decreasing they shall have been decreasing

Negation

Simple form	V-ing form
I shall not decrease you shall not decrease he shall not decrease we shall not decrease you shall not decrease they shall not decrease	I shall not be decreasing you shall not be decreasing he shall not be decreasing we shall not be decreasing you shall not be decreasing they shall not be decreasing
Perfect	V-ing perfect
I shall not have decreased you shall not have decreased he shall not have decreased we shall not have decreased you shall not have decreased they shall not have decreased	I shall not have been decreasing you shall not have been decreasing he shall not have been decreasing we shall not have been decreasing you shall not have been decreasing they shall not have been decreasing

Interrogative form

Simple form	V-ing form
shall I decrease? shall you decrease? shall he decrease? shall we decrease? shall you decrease? shall they decrease?	shall I be decreasing? shall you be decreasing? shall he be decreasing? shall we be decreasing? shall you be decreasing? shall they be decreasing?
Perfect	V-ing perfect
shall I have decreased? shall you have decreased? shall he have decreased? shall we have decreased? shall you have decreased? shall they have decreased?	shall I have been decreasing? shall you have been decreasing? shall he have been decreasing? shall we have been decreasing? shall you have been decreasing? shall they have been decreasing?

Interro-negative form

Simple form	V-ing form
shall I not decrease? shall you not decrease? shall he not decrease? shall we not decrease? shall you not decrease? shall they not decrease?	shall I not be decreasing? shall you not be decreasing? shall he not be decreasing? shall we not be decreasing? shall you not be decreasing? shall they not be decreasing?
Perfect	V-ing perfect
shall I not have decreased? shall you not have decreased? shall he not have decreased? shall we not have decreased? shall you not have decreased? shall they not have decreased?	shall I not have been decreasing? shall you not have been decreasing? shall he not have been decreasing? shall we not have been decreasing? shall you not have been decreasing? shall they not have been decreasing?