I must seize you must seize she must seize we must seize you must seize they must seize
V-ing form
I must be seizing you must be seizing she must be seizing we must be seizing you must be seizing they must be seizing
Perfect
I must have seized you must have seized she must have seized we must have seized you must have seized they must have seized
V-ing perfect
I must have been seizing you must have been seizing she must have been seizing we must have been seizing you must have been seizing they must have been seizing
Negation
Simple form
I must not seize you must not seize she must not seize we must not seize you must not seize they must not seize
V-ing form
I must not be seizing you must not be seizing she must not be seizing we must not be seizing you must not be seizing they must not be seizing
Perfect
I must not have seized you must not have seized she must not have seized we must not have seized you must not have seized they must not have seized
V-ing perfect
I must not have been seizing you must not have been seizing she must not have been seizing we must not have been seizing you must not have been seizing they must not have been seizing
Interrogative form
Simple form
must I seize? must you seize? must she seize? must we seize? must you seize? must they seize?
V-ing form
must I be seizing? must you be seizing? must she be seizing? must we be seizing? must you be seizing? must they be seizing?
Perfect
must I have seized? must you have seized? must she have seized? must we have seized? must you have seized? must they have seized?
V-ing perfect
must I have been seizing? must you have been seizing? must she have been seizing? must we have been seizing? must you have been seizing? must they have been seizing?
Interro-negative form
Simple form
must I not seize? must you not seize? must she not seize? must we not seize? must you not seize? must they not seize?
V-ing form
must I not be seizing? must you not be seizing? must she not be seizing? must we not be seizing? must you not be seizing? must they not be seizing?
Perfect
must I not have seized? must you not have seized? must she not have seized? must we not have seized? must you not have seized? must they not have seized?
V-ing perfect
must I not have been seizing? must you not have been seizing? must she not have been seizing? must we not have been seizing? must you not have been seizing? must they not have been seizing?