English verb conjugation
MUST DEEPEN

Regular verb: deepen - deepened - deepened

Affirmation

Simple form	V-ing form
I must deepen you must deepen she must deepen we must deepen you must deepen they must deepen	I must be deepening you must be deepening she must be deepening we must be deepening you must be deepening they must be deepening
Perfect	V-ing perfect
I must have deepened you must have deepened she must have deepened we must have deepened you must have deepened they must have deepened	I must have been deepening you must have been deepening she must have been deepening we must have been deepening you must have been deepening they must have been deepening

Negation

Simple form	V-ing form
I mustn't deepen you mustn't deepen she mustn't deepen we mustn't deepen you mustn't deepen they mustn't deepen	I mustn't be deepening you mustn't be deepening she mustn't be deepening we mustn't be deepening you mustn't be deepening they mustn't be deepening
Perfect	V-ing perfect
I mustn't have deepened you mustn't have deepened she mustn't have deepened we mustn't have deepened you mustn't have deepened they mustn't have deepened	I mustn't have been deepening you mustn't have been deepening she mustn't have been deepening we mustn't have been deepening you mustn't have been deepening they mustn't have been deepening

Interrogative form

Simple form	V-ing form
must I deepen? must you deepen? must she deepen? must we deepen? must you deepen? must they deepen?	must I be deepening? must you be deepening? must she be deepening? must we be deepening? must you be deepening? must they be deepening?
Perfect	V-ing perfect
must I have deepened? must you have deepened? must she have deepened? must we have deepened? must you have deepened? must they have deepened?	must I have been deepening? must you have been deepening? must she have been deepening? must we have been deepening? must you have been deepening? must they have been deepening?

Interro-negative form

Simple form	V-ing form
mustn't I deepen? mustn't you deepen? mustn't she deepen? mustn't we deepen? mustn't you deepen? mustn't they deepen?	mustn't I be deepening? mustn't you be deepening? mustn't she be deepening? mustn't we be deepening? mustn't you be deepening? mustn't they be deepening?
Perfect	V-ing perfect
mustn't I have deepened? mustn't you have deepened? mustn't she have deepened? mustn't we have deepened? mustn't you have deepened? mustn't they have deepened?	mustn't I have been deepening? mustn't you have been deepening? mustn't she have been deepening? mustn't we have been deepening? mustn't you have been deepening? mustn't they have been deepening?