could tincture
Regular verb: tincture - tinctured- tinctured

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could tincture
you could tincture
she could tincture
we could tincture
you could tincture
they could tincture 	I could be tincturing
you could be tincturing
she could be tincturing
we could be tincturing
you could be tincturing
they could be tincturing	I could have tinctured
you could have tinctured
she could have tinctured
we could have tinctured
you could have tinctured
they could have tinctured	I could have been tincturing
you could have been tincturing
she could have been tincturing
we could have been tincturing
you could have been tincturing
they could have been tincturing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't tincture
you couldn't tincture
she couldn't tincture
we couldn't tincture
you couldn't tincture
they couldn't tincture 	I couldn't be tincturing
you couldn't be tincturing
she couldn't be tincturing
we couldn't be tincturing
you couldn't be tincturing
they couldn't be tincturing	I couldn't have tinctured
you couldn't have tinctured
she couldn't have tinctured
we couldn't have tinctured
you couldn't have tinctured
they couldn't have tinctured	I couldn't have been tincturing
you couldn't have been tincturing
she couldn't have been tincturing
we couldn't have been tincturing
you couldn't have been tincturing
they couldn't have been tincturing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I tincture?
could you tincture?
could she tincture?
could we tincture?
could you tincture?
could they tincture? 	could I be tincturing?
could you be tincturing?
could she be tincturing?
could we be tincturing?
could you be tincturing?
could they be tincturing? 	could I have tinctured?
could you have tinctured?
could she have tinctured?
could we have tinctured?
could you have tinctured?
could they have tinctured? 	could I have been tincturing?
could you have been tincturing?
could she have been tincturing?
could we have been tincturing?
could you have been tincturing?
could they have been tincturing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I tincture?
couldn't you tincture?
couldn't she tincture?
couldn't we tincture?
couldn't you tincture?
couldn't they tincture? 	couldn't I be tincturing?
couldn't you be tincturing?
couldn't she be tincturing?
couldn't we be tincturing?
couldn't you be tincturing?
couldn't they be tincturing? 	couldn't I have tinctured?
couldn't you have tinctured?
couldn't she have tinctured?
couldn't we have tinctured?
couldn't you have tinctured?
couldn't they have tinctured? 	couldn't I have been tincturing?
couldn't you have been tincturing?
couldn't she have been tincturing?
couldn't we have been tincturing?
couldn't you have been tincturing?
couldn't they have been tincturing?