English verb conjugation
MUST RESTRENGTHEN

Regular verb: restrengthen - restrengthened - restrengthened

Affirmation

Simple form	V-ing form
I must restrengthen you must restrengthen he must restrengthen we must restrengthen you must restrengthen they must restrengthen	I must be restrengthening you must be restrengthening he must be restrengthening we must be restrengthening you must be restrengthening they must be restrengthening
Perfect	V-ing perfect
I must have restrengthened you must have restrengthened he must have restrengthened we must have restrengthened you must have restrengthened they must have restrengthened	I must have been restrengthening you must have been restrengthening he must have been restrengthening we must have been restrengthening you must have been restrengthening they must have been restrengthening

Negation

Simple form	V-ing form
I mustn't restrengthen you mustn't restrengthen he mustn't restrengthen we mustn't restrengthen you mustn't restrengthen they mustn't restrengthen	I mustn't be restrengthening you mustn't be restrengthening he mustn't be restrengthening we mustn't be restrengthening you mustn't be restrengthening they mustn't be restrengthening
Perfect	V-ing perfect
I mustn't have restrengthened you mustn't have restrengthened he mustn't have restrengthened we mustn't have restrengthened you mustn't have restrengthened they mustn't have restrengthened	I mustn't have been restrengthening you mustn't have been restrengthening he mustn't have been restrengthening we mustn't have been restrengthening you mustn't have been restrengthening they mustn't have been restrengthening

Interrogative form

Simple form	V-ing form
must I restrengthen? must you restrengthen? must he restrengthen? must we restrengthen? must you restrengthen? must they restrengthen?	must I be restrengthening? must you be restrengthening? must he be restrengthening? must we be restrengthening? must you be restrengthening? must they be restrengthening?
Perfect	V-ing perfect
must I have restrengthened? must you have restrengthened? must he have restrengthened? must we have restrengthened? must you have restrengthened? must they have restrengthened?	must I have been restrengthening? must you have been restrengthening? must he have been restrengthening? must we have been restrengthening? must you have been restrengthening? must they have been restrengthening?

Interro-negative form

Simple form	V-ing form
mustn't I restrengthen? mustn't you restrengthen? mustn't he restrengthen? mustn't we restrengthen? mustn't you restrengthen? mustn't they restrengthen?	mustn't I be restrengthening? mustn't you be restrengthening? mustn't he be restrengthening? mustn't we be restrengthening? mustn't you be restrengthening? mustn't they be restrengthening?
Perfect	V-ing perfect
mustn't I have restrengthened? mustn't you have restrengthened? mustn't he have restrengthened? mustn't we have restrengthened? mustn't you have restrengthened? mustn't they have restrengthened?	mustn't I have been restrengthening? mustn't you have been restrengthening? mustn't he have been restrengthening? mustn't we have been restrengthening? mustn't you have been restrengthening? mustn't they have been restrengthening?