must tinsel
Regular verb: tinsel - tinselled- tinselled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must tinsel
you must tinsel
he must tinsel
we must tinsel
you must tinsel
they must tinsel 	I must be tinselling
you must be tinselling
he must be tinselling
we must be tinselling
you must be tinselling
they must be tinselling	I must have tinselled
you must have tinselled
he must have tinselled
we must have tinselled
you must have tinselled
they must have tinselled	I must have been tinselling
you must have been tinselling
he must have been tinselling
we must have been tinselling
you must have been tinselling
they must have been tinselling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not tinsel
you must not tinsel
he must not tinsel
we must not tinsel
you must not tinsel
they must not tinsel 	I must not be tinselling
you must not be tinselling
he must not be tinselling
we must not be tinselling
you must not be tinselling
they must not be tinselling	I must not have tinselled
you must not have tinselled
he must not have tinselled
we must not have tinselled
you must not have tinselled
they must not have tinselled	I must not have been tinselling
you must not have been tinselling
he must not have been tinselling
we must not have been tinselling
you must not have been tinselling
they must not have been tinselling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I tinsel?
must you tinsel?
must he tinsel?
must we tinsel?
must you tinsel?
must they tinsel? 	must I be tinselling?
must you be tinselling?
must he be tinselling?
must we be tinselling?
must you be tinselling?
must they be tinselling? 	must I have tinselled?
must you have tinselled?
must he have tinselled?
must we have tinselled?
must you have tinselled?
must they have tinselled? 	must I have been tinselling?
must you have been tinselling?
must he have been tinselling?
must we have been tinselling?
must you have been tinselling?
must they have been tinselling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not tinsel?
must you not tinsel?
must he not tinsel?
must we not tinsel?
must you not tinsel?
must they not tinsel? 	must I not be tinselling?
must you not be tinselling?
must he not be tinselling?
must we not be tinselling?
must you not be tinselling?
must they not be tinselling? 	must I not have tinselled?
must you not have tinselled?
must he not have tinselled?
must we not have tinselled?
must you not have tinselled?
must they not have tinselled? 	must I not have been tinselling?
must you not have been tinselling?
must he not have been tinselling?
must we not have been tinselling?
must you not have been tinselling?
must they not have been tinselling?