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 must not overstrain you must not overstrain he must not overstrain we must not overstrain you must not overstrain they must not overstrain	I must not be overstraining you must not be overstraining he must not be overstraining we must not be overstraining you must not be overstraining they must not be overstraining
Perfect	V-ing perfect
I must not have overstrained you must not have overstrained he must not have overstrained we must not have overstrained you must not have overstrained they must not have overstrained	I must not have been overstraining you must not have been overstraining he must not have been overstraining we must not have been overstraining you must not have been overstraining they must not 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
must I not overstrain? must you not overstrain? must he not overstrain? must we not overstrain? must you not overstrain? must they not overstrain?	must I not be overstraining? must you not be overstraining? must he not be overstraining? must we not be overstraining? must you not be overstraining? must they not be overstraining?
Perfect	V-ing perfect
must I not have overstrained? must you not have overstrained? must he not have overstrained? must we not have overstrained? must you not have overstrained? must they not have overstrained?	must I not have been overstraining? must you not have been overstraining? must he not have been overstraining? must we not have been overstraining? must you not have been overstraining? must they not have been overstraining?