English verb conjugation
MUST INTERN

Regular verb: intern - interned - interned

Affirmation

Simple form	V-ing form
I must intern you must intern she must intern we must intern you must intern they must intern	I must be interning you must be interning she must be interning we must be interning you must be interning they must be interning
Perfect	V-ing perfect
I must have interned you must have interned she must have interned we must have interned you must have interned they must have interned	I must have been interning you must have been interning she must have been interning we must have been interning you must have been interning they must have been interning

Negation

Simple form	V-ing form
I must not intern you must not intern she must not intern we must not intern you must not intern they must not intern	I must not be interning you must not be interning she must not be interning we must not be interning you must not be interning they must not be interning
Perfect	V-ing perfect
I must not have interned you must not have interned she must not have interned we must not have interned you must not have interned they must not have interned	I must not have been interning you must not have been interning she must not have been interning we must not have been interning you must not have been interning they must not have been interning

Interrogative form

Simple form	V-ing form
must I intern? must you intern? must she intern? must we intern? must you intern? must they intern?	must I be interning? must you be interning? must she be interning? must we be interning? must you be interning? must they be interning?
Perfect	V-ing perfect
must I have interned? must you have interned? must she have interned? must we have interned? must you have interned? must they have interned?	must I have been interning? must you have been interning? must she have been interning? must we have been interning? must you have been interning? must they have been interning?

Interro-negative form

Simple form	V-ing form
must I not intern? must you not intern? must she not intern? must we not intern? must you not intern? must they not intern?	must I not be interning? must you not be interning? must she not be interning? must we not be interning? must you not be interning? must they not be interning?
Perfect	V-ing perfect
must I not have interned? must you not have interned? must she not have interned? must we not have interned? must you not have interned? must they not have interned?	must I not have been interning? must you not have been interning? must she not have been interning? must we not have been interning? must you not have been interning? must they not have been interning?