English verb conjugation
MUST GRAIN

Regular verb: grain - grained - grained

Affirmation

Simple form	V-ing form
I must grain you must grain he must grain we must grain you must grain they must grain	I must be graining you must be graining he must be graining we must be graining you must be graining they must be graining
Perfect	V-ing perfect
I must have grained you must have grained he must have grained we must have grained you must have grained they must have grained	I must have been graining you must have been graining he must have been graining we must have been graining you must have been graining they must have been graining

Negation

Simple form	V-ing form
I must not grain you must not grain he must not grain we must not grain you must not grain they must not grain	I must not be graining you must not be graining he must not be graining we must not be graining you must not be graining they must not be graining
Perfect	V-ing perfect
I must not have grained you must not have grained he must not have grained we must not have grained you must not have grained they must not have grained	I must not have been graining you must not have been graining he must not have been graining we must not have been graining you must not have been graining they must not have been graining

Interrogative form

Simple form	V-ing form
must I grain? must you grain? must he grain? must we grain? must you grain? must they grain?	must I be graining? must you be graining? must he be graining? must we be graining? must you be graining? must they be graining?
Perfect	V-ing perfect
must I have grained? must you have grained? must he have grained? must we have grained? must you have grained? must they have grained?	must I have been graining? must you have been graining? must he have been graining? must we have been graining? must you have been graining? must they have been graining?

Interro-negative form

Simple form	V-ing form
must I not grain? must you not grain? must he not grain? must we not grain? must you not grain? must they not grain?	must I not be graining? must you not be graining? must he not be graining? must we not be graining? must you not be graining? must they not be graining?
Perfect	V-ing perfect
must I not have grained? must you not have grained? must he not have grained? must we not have grained? must you not have grained? must they not have grained?	must I not have been graining? must you not have been graining? must he not have been graining? must we not have been graining? must you not have been graining? must they not have been graining?