English verb conjugation
MAY UNDERESTIMATE

Regular verb: underestimate - underestimated - underestimated

Affirmation

Simple form	V-ing form
I may underestimate you may underestimate she may underestimate we may underestimate you may underestimate they may underestimate	I may be underestimating you may be underestimating she 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 she 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 she 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 she 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 she 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 she 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 she 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 she underestimate? may we underestimate? may you underestimate? may they underestimate?	may I be underestimating? may you be underestimating? may she 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 she 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 she 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 she 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 she 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 she 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 she have been underestimating? mayn't we have been underestimating? mayn't you have been underestimating? mayn't they have been underestimating?