could glissade
Regular verb: glissade - glissaded- glissaded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could glissade
you could glissade
she could glissade
we could glissade
you could glissade
they could glissade 	I could be glissading
you could be glissading
she could be glissading
we could be glissading
you could be glissading
they could be glissading	I could have glissaded
you could have glissaded
she could have glissaded
we could have glissaded
you could have glissaded
they could have glissaded	I could have been glissading
you could have been glissading
she could have been glissading
we could have been glissading
you could have been glissading
they could have been glissading	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't glissade
you couldn't glissade
she couldn't glissade
we couldn't glissade
you couldn't glissade
they couldn't glissade 	I couldn't be glissading
you couldn't be glissading
she couldn't be glissading
we couldn't be glissading
you couldn't be glissading
they couldn't be glissading	I couldn't have glissaded
you couldn't have glissaded
she couldn't have glissaded
we couldn't have glissaded
you couldn't have glissaded
they couldn't have glissaded	I couldn't have been glissading
you couldn't have been glissading
she couldn't have been glissading
we couldn't have been glissading
you couldn't have been glissading
they couldn't have been glissading	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I glissade?
could you glissade?
could she glissade?
could we glissade?
could you glissade?
could they glissade? 	could I be glissading?
could you be glissading?
could she be glissading?
could we be glissading?
could you be glissading?
could they be glissading? 	could I have glissaded?
could you have glissaded?
could she have glissaded?
could we have glissaded?
could you have glissaded?
could they have glissaded? 	could I have been glissading?
could you have been glissading?
could she have been glissading?
could we have been glissading?
could you have been glissading?
could they have been glissading? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I glissade?
couldn't you glissade?
couldn't she glissade?
couldn't we glissade?
couldn't you glissade?
couldn't they glissade? 	couldn't I be glissading?
couldn't you be glissading?
couldn't she be glissading?
couldn't we be glissading?
couldn't you be glissading?
couldn't they be glissading? 	couldn't I have glissaded?
couldn't you have glissaded?
couldn't she have glissaded?
couldn't we have glissaded?
couldn't you have glissaded?
couldn't they have glissaded? 	couldn't I have been glissading?
couldn't you have been glissading?
couldn't she have been glissading?
couldn't we have been glissading?
couldn't you have been glissading?
couldn't they have been glissading?