English verb conjugation
MUST WHIRL

Regular verb: whirl - whirled - whirled

Affirmation

Simple form	V-ing form
I must whirl you must whirl she must whirl we must whirl you must whirl they must whirl	I must be whirling you must be whirling she must be whirling we must be whirling you must be whirling they must be whirling
Perfect	V-ing perfect
I must have whirled you must have whirled she must have whirled we must have whirled you must have whirled they must have whirled	I must have been whirling you must have been whirling she must have been whirling we must have been whirling you must have been whirling they must have been whirling

Negation

Simple form	V-ing form
I must not whirl you must not whirl she must not whirl we must not whirl you must not whirl they must not whirl	I must not be whirling you must not be whirling she must not be whirling we must not be whirling you must not be whirling they must not be whirling
Perfect	V-ing perfect
I must not have whirled you must not have whirled she must not have whirled we must not have whirled you must not have whirled they must not have whirled	I must not have been whirling you must not have been whirling she must not have been whirling we must not have been whirling you must not have been whirling they must not have been whirling

Interrogative form

Simple form	V-ing form
must I whirl? must you whirl? must she whirl? must we whirl? must you whirl? must they whirl?	must I be whirling? must you be whirling? must she be whirling? must we be whirling? must you be whirling? must they be whirling?
Perfect	V-ing perfect
must I have whirled? must you have whirled? must she have whirled? must we have whirled? must you have whirled? must they have whirled?	must I have been whirling? must you have been whirling? must she have been whirling? must we have been whirling? must you have been whirling? must they have been whirling?

Interro-negative form

Simple form	V-ing form
must I not whirl? must you not whirl? must she not whirl? must we not whirl? must you not whirl? must they not whirl?	must I not be whirling? must you not be whirling? must she not be whirling? must we not be whirling? must you not be whirling? must they not be whirling?
Perfect	V-ing perfect
must I not have whirled? must you not have whirled? must she not have whirled? must we not have whirled? must you not have whirled? must they not have whirled?	must I not have been whirling? must you not have been whirling? must she not have been whirling? must we not have been whirling? must you not have been whirling? must they not have been whirling?