could gloss
Regular verb: gloss - glossed- glossed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could gloss
you could gloss
he could gloss
we could gloss
you could gloss
they could gloss 	I could be glossing
you could be glossing
he could be glossing
we could be glossing
you could be glossing
they could be glossing	I could have glossed
you could have glossed
he could have glossed
we could have glossed
you could have glossed
they could have glossed	I could have been glossing
you could have been glossing
he could have been glossing
we could have been glossing
you could have been glossing
they could have been glossing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't gloss
you couldn't gloss
he couldn't gloss
we couldn't gloss
you couldn't gloss
they couldn't gloss 	I couldn't be glossing
you couldn't be glossing
he couldn't be glossing
we couldn't be glossing
you couldn't be glossing
they couldn't be glossing	I couldn't have glossed
you couldn't have glossed
he couldn't have glossed
we couldn't have glossed
you couldn't have glossed
they couldn't have glossed	I couldn't have been glossing
you couldn't have been glossing
he couldn't have been glossing
we couldn't have been glossing
you couldn't have been glossing
they couldn't have been glossing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I gloss?
could you gloss?
could he gloss?
could we gloss?
could you gloss?
could they gloss? 	could I be glossing?
could you be glossing?
could he be glossing?
could we be glossing?
could you be glossing?
could they be glossing? 	could I have glossed?
could you have glossed?
could he have glossed?
could we have glossed?
could you have glossed?
could they have glossed? 	could I have been glossing?
could you have been glossing?
could he have been glossing?
could we have been glossing?
could you have been glossing?
could they have been glossing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I gloss?
couldn't you gloss?
couldn't he gloss?
couldn't we gloss?
couldn't you gloss?
couldn't they gloss? 	couldn't I be glossing?
couldn't you be glossing?
couldn't he be glossing?
couldn't we be glossing?
couldn't you be glossing?
couldn't they be glossing? 	couldn't I have glossed?
couldn't you have glossed?
couldn't he have glossed?
couldn't we have glossed?
couldn't you have glossed?
couldn't they have glossed? 	couldn't I have been glossing?
couldn't you have been glossing?
couldn't he have been glossing?
couldn't we have been glossing?
couldn't you have been glossing?
couldn't they have been glossing?