English verb conjugation
MUST WHELP

Regular verb: whelp - whelped - whelped

Affirmation

Simple form	V-ing form
I must whelp you must whelp he must whelp we must whelp you must whelp they must whelp	I must be whelping you must be whelping he must be whelping we must be whelping you must be whelping they must be whelping
Perfect	V-ing perfect
I must have whelped you must have whelped he must have whelped we must have whelped you must have whelped they must have whelped	I must have been whelping you must have been whelping he must have been whelping we must have been whelping you must have been whelping they must have been whelping

Negation

Simple form	V-ing form
I mustn't whelp you mustn't whelp he mustn't whelp we mustn't whelp you mustn't whelp they mustn't whelp	I mustn't be whelping you mustn't be whelping he mustn't be whelping we mustn't be whelping you mustn't be whelping they mustn't be whelping
Perfect	V-ing perfect
I mustn't have whelped you mustn't have whelped he mustn't have whelped we mustn't have whelped you mustn't have whelped they mustn't have whelped	I mustn't have been whelping you mustn't have been whelping he mustn't have been whelping we mustn't have been whelping you mustn't have been whelping they mustn't have been whelping

Interrogative form

Simple form	V-ing form
must I whelp? must you whelp? must he whelp? must we whelp? must you whelp? must they whelp?	must I be whelping? must you be whelping? must he be whelping? must we be whelping? must you be whelping? must they be whelping?
Perfect	V-ing perfect
must I have whelped? must you have whelped? must he have whelped? must we have whelped? must you have whelped? must they have whelped?	must I have been whelping? must you have been whelping? must he have been whelping? must we have been whelping? must you have been whelping? must they have been whelping?

Interro-negative form

Simple form	V-ing form
mustn't I whelp? mustn't you whelp? mustn't he whelp? mustn't we whelp? mustn't you whelp? mustn't they whelp?	mustn't I be whelping? mustn't you be whelping? mustn't he be whelping? mustn't we be whelping? mustn't you be whelping? mustn't they be whelping?
Perfect	V-ing perfect
mustn't I have whelped? mustn't you have whelped? mustn't he have whelped? mustn't we have whelped? mustn't you have whelped? mustn't they have whelped?	mustn't I have been whelping? mustn't you have been whelping? mustn't he have been whelping? mustn't we have been whelping? mustn't you have been whelping? mustn't they have been whelping?