must double-knit
Regular verb: double-knit - double-knited- double-knited

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must double-knit
you must double-knit
she must double-knit
we must double-knit
you must double-knit
they must double-knit 	I must be double-kniting
you must be double-kniting
she must be double-kniting
we must be double-kniting
you must be double-kniting
they must be double-kniting	I must have double-knited
you must have double-knited
she must have double-knited
we must have double-knited
you must have double-knited
they must have double-knited	I must have been double-kniting
you must have been double-kniting
she must have been double-kniting
we must have been double-kniting
you must have been double-kniting
they must have been double-kniting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not double-knit
you must not double-knit
she must not double-knit
we must not double-knit
you must not double-knit
they must not double-knit 	I must not be double-kniting
you must not be double-kniting
she must not be double-kniting
we must not be double-kniting
you must not be double-kniting
they must not be double-kniting	I must not have double-knited
you must not have double-knited
she must not have double-knited
we must not have double-knited
you must not have double-knited
they must not have double-knited	I must not have been double-kniting
you must not have been double-kniting
she must not have been double-kniting
we must not have been double-kniting
you must not have been double-kniting
they must not have been double-kniting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I double-knit?
must you double-knit?
must she double-knit?
must we double-knit?
must you double-knit?
must they double-knit? 	must I be double-kniting?
must you be double-kniting?
must she be double-kniting?
must we be double-kniting?
must you be double-kniting?
must they be double-kniting? 	must I have double-knited?
must you have double-knited?
must she have double-knited?
must we have double-knited?
must you have double-knited?
must they have double-knited? 	must I have been double-kniting?
must you have been double-kniting?
must she have been double-kniting?
must we have been double-kniting?
must you have been double-kniting?
must they have been double-kniting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not double-knit?
must you not double-knit?
must she not double-knit?
must we not double-knit?
must you not double-knit?
must they not double-knit? 	must I not be double-kniting?
must you not be double-kniting?
must she not be double-kniting?
must we not be double-kniting?
must you not be double-kniting?
must they not be double-kniting? 	must I not have double-knited?
must you not have double-knited?
must she not have double-knited?
must we not have double-knited?
must you not have double-knited?
must they not have double-knited? 	must I not have been double-kniting?
must you not have been double-kniting?
must she not have been double-kniting?
must we not have been double-kniting?
must you not have been double-kniting?
must they not have been double-kniting?