English verb conjugation
MUST OVERESTIMATE

Regular verb: overestimate - overestimated - overestimated

Affirmation

Simple form	V-ing form
I must overestimate you must overestimate he must overestimate we must overestimate you must overestimate they must overestimate	I must be overestimating you must be overestimating he must be overestimating we must be overestimating you must be overestimating they must be overestimating
Perfect	V-ing perfect
I must have overestimated you must have overestimated he must have overestimated we must have overestimated you must have overestimated they must have overestimated	I must have been overestimating you must have been overestimating he must have been overestimating we must have been overestimating you must have been overestimating they must have been overestimating

Negation

Simple form	V-ing form
I mustn't overestimate you mustn't overestimate he mustn't overestimate we mustn't overestimate you mustn't overestimate they mustn't overestimate	I mustn't be overestimating you mustn't be overestimating he mustn't be overestimating we mustn't be overestimating you mustn't be overestimating they mustn't be overestimating
Perfect	V-ing perfect
I mustn't have overestimated you mustn't have overestimated he mustn't have overestimated we mustn't have overestimated you mustn't have overestimated they mustn't have overestimated	I mustn't have been overestimating you mustn't have been overestimating he mustn't have been overestimating we mustn't have been overestimating you mustn't have been overestimating they mustn't have been overestimating

Interrogative form

Simple form	V-ing form
must I overestimate? must you overestimate? must he overestimate? must we overestimate? must you overestimate? must they overestimate?	must I be overestimating? must you be overestimating? must he be overestimating? must we be overestimating? must you be overestimating? must they be overestimating?
Perfect	V-ing perfect
must I have overestimated? must you have overestimated? must he have overestimated? must we have overestimated? must you have overestimated? must they have overestimated?	must I have been overestimating? must you have been overestimating? must he have been overestimating? must we have been overestimating? must you have been overestimating? must they have been overestimating?

Interro-negative form

Simple form	V-ing form
mustn't I overestimate? mustn't you overestimate? mustn't he overestimate? mustn't we overestimate? mustn't you overestimate? mustn't they overestimate?	mustn't I be overestimating? mustn't you be overestimating? mustn't he be overestimating? mustn't we be overestimating? mustn't you be overestimating? mustn't they be overestimating?
Perfect	V-ing perfect
mustn't I have overestimated? mustn't you have overestimated? mustn't he have overestimated? mustn't we have overestimated? mustn't you have overestimated? mustn't they have overestimated?	mustn't I have been overestimating? mustn't you have been overestimating? mustn't he have been overestimating? mustn't we have been overestimating? mustn't you have been overestimating? mustn't they have been overestimating?