English verb conjugation
MAY UNDERESTIMATE

Regular verb: underestimate - underestimated - underestimated

Affirmation

Simple form	V-ing form
I may underestimate you may underestimate he may underestimate we may underestimate you may underestimate they may underestimate	I may be underestimating you may be underestimating he may be underestimating we may be underestimating you may be underestimating they may be underestimating
Perfect	V-ing perfect
I may have underestimated you may have underestimated he may have underestimated we may have underestimated you may have underestimated they may have underestimated	I may have been underestimating you may have been underestimating he may have been underestimating we may have been underestimating you may have been underestimating they may have been underestimating

Negation

Simple form	V-ing form
I mayn't underestimate you mayn't underestimate he mayn't underestimate we mayn't underestimate you mayn't underestimate they mayn't underestimate	I mayn't be underestimating you mayn't be underestimating he mayn't be underestimating we mayn't be underestimating you mayn't be underestimating they mayn't be underestimating
Perfect	V-ing perfect
I mayn't have underestimated you mayn't have underestimated he mayn't have underestimated we mayn't have underestimated you mayn't have underestimated they mayn't have underestimated	I mayn't have been underestimating you mayn't have been underestimating he mayn't have been underestimating we mayn't have been underestimating you mayn't have been underestimating they mayn't have been underestimating

Interrogative form

Simple form	V-ing form
may I underestimate? may you underestimate? may he underestimate? may we underestimate? may you underestimate? may they underestimate?	may I be underestimating? may you be underestimating? may he be underestimating? may we be underestimating? may you be underestimating? may they be underestimating?
Perfect	V-ing perfect
may I have underestimated? may you have underestimated? may he have underestimated? may we have underestimated? may you have underestimated? may they have underestimated?	may I have been underestimating? may you have been underestimating? may he have been underestimating? may we have been underestimating? may you have been underestimating? may they have been underestimating?

Interro-negative form

Simple form	V-ing form
mayn't I underestimate? mayn't you underestimate? mayn't he underestimate? mayn't we underestimate? mayn't you underestimate? mayn't they underestimate?	mayn't I be underestimating? mayn't you be underestimating? mayn't he be underestimating? mayn't we be underestimating? mayn't you be underestimating? mayn't they be underestimating?
Perfect	V-ing perfect
mayn't I have underestimated? mayn't you have underestimated? mayn't he have underestimated? mayn't we have underestimated? mayn't you have underestimated? mayn't they have underestimated?	mayn't I have been underestimating? mayn't you have been underestimating? mayn't he have been underestimating? mayn't we have been underestimating? mayn't you have been underestimating? mayn't they have been underestimating?