could tinsel
Regular verb: tinsel - tinselled- tinselled

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

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't tinsel
you couldn't tinsel
he couldn't tinsel
we couldn't tinsel
you couldn't tinsel
they couldn't tinsel 	I couldn't be tinselling
you couldn't be tinselling
he couldn't be tinselling
we couldn't be tinselling
you couldn't be tinselling
they couldn't be tinselling	I couldn't have tinselled
you couldn't have tinselled
he couldn't have tinselled
we couldn't have tinselled
you couldn't have tinselled
they couldn't have tinselled	I couldn't have been tinselling
you couldn't have been tinselling
he couldn't have been tinselling
we couldn't have been tinselling
you couldn't have been tinselling
they couldn't have been tinselling	

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

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