English verb conjugation
MAY DECREASE

Regular verb: decrease - decreased - decreased

Affirmation

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

Negation

Simple form	V-ing form
I mayn't decrease you mayn't decrease he mayn't decrease we mayn't decrease you mayn't decrease they mayn't decrease	I mayn't be decreasing you mayn't be decreasing he mayn't be decreasing we mayn't be decreasing you mayn't be decreasing they mayn't be decreasing
Perfect	V-ing perfect
I mayn't have decreased you mayn't have decreased he mayn't have decreased we mayn't have decreased you mayn't have decreased they mayn't have decreased	I mayn't have been decreasing you mayn't have been decreasing he mayn't have been decreasing we mayn't have been decreasing you mayn't have been decreasing they mayn't have been decreasing

Interrogative form

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

Interro-negative form

Simple form	V-ing form
mayn't I decrease? mayn't you decrease? mayn't he decrease? mayn't we decrease? mayn't you decrease? mayn't they decrease?	mayn't I be decreasing? mayn't you be decreasing? mayn't he be decreasing? mayn't we be decreasing? mayn't you be decreasing? mayn't they be decreasing?
Perfect	V-ing perfect
mayn't I have decreased? mayn't you have decreased? mayn't he have decreased? mayn't we have decreased? mayn't you have decreased? mayn't they have decreased?	mayn't I have been decreasing? mayn't you have been decreasing? mayn't he have been decreasing? mayn't we have been decreasing? mayn't you have been decreasing? mayn't they have been decreasing?