English verb conjugation
MUST OVERSTRAIN

Regular verb: overstrain - overstrained - overstrained

Affirmation

Simple form	V-ing form
I must overstrain you must overstrain he must overstrain we must overstrain you must overstrain they must overstrain	I must be overstraining you must be overstraining he must be overstraining we must be overstraining you must be overstraining they must be overstraining
Perfect	V-ing perfect
I must have overstrained you must have overstrained he must have overstrained we must have overstrained you must have overstrained they must have overstrained	I must have been overstraining you must have been overstraining he must have been overstraining we must have been overstraining you must have been overstraining they must have been overstraining

Negation

Simple form	V-ing form
I mustn't overstrain you mustn't overstrain he mustn't overstrain we mustn't overstrain you mustn't overstrain they mustn't overstrain	I mustn't be overstraining you mustn't be overstraining he mustn't be overstraining we mustn't be overstraining you mustn't be overstraining they mustn't be overstraining
Perfect	V-ing perfect
I mustn't have overstrained you mustn't have overstrained he mustn't have overstrained we mustn't have overstrained you mustn't have overstrained they mustn't have overstrained	I mustn't have been overstraining you mustn't have been overstraining he mustn't have been overstraining we mustn't have been overstraining you mustn't have been overstraining they mustn't have been overstraining

Interrogative form

Simple form	V-ing form
must I overstrain? must you overstrain? must he overstrain? must we overstrain? must you overstrain? must they overstrain?	must I be overstraining? must you be overstraining? must he be overstraining? must we be overstraining? must you be overstraining? must they be overstraining?
Perfect	V-ing perfect
must I have overstrained? must you have overstrained? must he have overstrained? must we have overstrained? must you have overstrained? must they have overstrained?	must I have been overstraining? must you have been overstraining? must he have been overstraining? must we have been overstraining? must you have been overstraining? must they have been overstraining?

Interro-negative form

Simple form	V-ing form
mustn't I overstrain? mustn't you overstrain? mustn't he overstrain? mustn't we overstrain? mustn't you overstrain? mustn't they overstrain?	mustn't I be overstraining? mustn't you be overstraining? mustn't he be overstraining? mustn't we be overstraining? mustn't you be overstraining? mustn't they be overstraining?
Perfect	V-ing perfect
mustn't I have overstrained? mustn't you have overstrained? mustn't he have overstrained? mustn't we have overstrained? mustn't you have overstrained? mustn't they have overstrained?	mustn't I have been overstraining? mustn't you have been overstraining? mustn't he have been overstraining? mustn't we have been overstraining? mustn't you have been overstraining? mustn't they have been overstraining?