must windlass
Regular verb: windlass - windlassed- windlassed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must windlass
you must windlass
she must windlass
we must windlass
you must windlass
they must windlass 	I must be windlassing
you must be windlassing
she must be windlassing
we must be windlassing
you must be windlassing
they must be windlassing	I must have windlassed
you must have windlassed
she must have windlassed
we must have windlassed
you must have windlassed
they must have windlassed	I must have been windlassing
you must have been windlassing
she must have been windlassing
we must have been windlassing
you must have been windlassing
they must have been windlassing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't windlass
you mustn't windlass
she mustn't windlass
we mustn't windlass
you mustn't windlass
they mustn't windlass 	I mustn't be windlassing
you mustn't be windlassing
she mustn't be windlassing
we mustn't be windlassing
you mustn't be windlassing
they mustn't be windlassing	I mustn't have windlassed
you mustn't have windlassed
she mustn't have windlassed
we mustn't have windlassed
you mustn't have windlassed
they mustn't have windlassed	I mustn't have been windlassing
you mustn't have been windlassing
she mustn't have been windlassing
we mustn't have been windlassing
you mustn't have been windlassing
they mustn't have been windlassing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I windlass?
must you windlass?
must she windlass?
must we windlass?
must you windlass?
must they windlass? 	must I be windlassing?
must you be windlassing?
must she be windlassing?
must we be windlassing?
must you be windlassing?
must they be windlassing? 	must I have windlassed?
must you have windlassed?
must she have windlassed?
must we have windlassed?
must you have windlassed?
must they have windlassed? 	must I have been windlassing?
must you have been windlassing?
must she have been windlassing?
must we have been windlassing?
must you have been windlassing?
must they have been windlassing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I windlass?
mustn't you windlass?
mustn't she windlass?
mustn't we windlass?
mustn't you windlass?
mustn't they windlass? 	mustn't I be windlassing?
mustn't you be windlassing?
mustn't she be windlassing?
mustn't we be windlassing?
mustn't you be windlassing?
mustn't they be windlassing? 	mustn't I have windlassed?
mustn't you have windlassed?
mustn't she have windlassed?
mustn't we have windlassed?
mustn't you have windlassed?
mustn't they have windlassed? 	mustn't I have been windlassing?
mustn't you have been windlassing?
mustn't she have been windlassing?
mustn't we have been windlassing?
mustn't you have been windlassing?
mustn't they have been windlassing?