must whelp
Regular verb: whelp - whelped- whelped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
I must not whelp
you must not whelp
he must not whelp
we must not whelp
you must not whelp
they must not whelp 	I must not be whelping
you must not be whelping
he must not be whelping
we must not be whelping
you must not be whelping
they must not be whelping	I must not have whelped
you must not have whelped
he must not have whelped
we must not have whelped
you must not have whelped
they must not have whelped	I must not have been whelping
you must not have been whelping
he must not have been whelping
we must not have been whelping
you must not have been whelping
they must not have been whelping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
must I not whelp?
must you not whelp?
must he not whelp?
must we not whelp?
must you not whelp?
must they not whelp? 	must I not be whelping?
must you not be whelping?
must he not be whelping?
must we not be whelping?
must you not be whelping?
must they not be whelping? 	must I not have whelped?
must you not have whelped?
must he not have whelped?
must we not have whelped?
must you not have whelped?
must they not have whelped? 	must I not have been whelping?
must you not have been whelping?
must he not have been whelping?
must we not have been whelping?
must you not have been whelping?
must they not have been whelping?