must whirl
Regular verb: whirl - whirled- whirled

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