could glad
Regular verb: glad - gladed- gladed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could glad
you could glad
he could glad
we could glad
you could glad
they could glad 	I could be glading
you could be glading
he could be glading
we could be glading
you could be glading
they could be glading	I could have gladed
you could have gladed
he could have gladed
we could have gladed
you could have gladed
they could have gladed	I could have been glading
you could have been glading
he could have been glading
we could have been glading
you could have been glading
they could have been glading	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't glad
you couldn't glad
he couldn't glad
we couldn't glad
you couldn't glad
they couldn't glad 	I couldn't be glading
you couldn't be glading
he couldn't be glading
we couldn't be glading
you couldn't be glading
they couldn't be glading	I couldn't have gladed
you couldn't have gladed
he couldn't have gladed
we couldn't have gladed
you couldn't have gladed
they couldn't have gladed	I couldn't have been glading
you couldn't have been glading
he couldn't have been glading
we couldn't have been glading
you couldn't have been glading
they couldn't have been glading	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I glad?
could you glad?
could he glad?
could we glad?
could you glad?
could they glad? 	could I be glading?
could you be glading?
could he be glading?
could we be glading?
could you be glading?
could they be glading? 	could I have gladed?
could you have gladed?
could he have gladed?
could we have gladed?
could you have gladed?
could they have gladed? 	could I have been glading?
could you have been glading?
could he have been glading?
could we have been glading?
could you have been glading?
could they have been glading? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I glad?
couldn't you glad?
couldn't he glad?
couldn't we glad?
couldn't you glad?
couldn't they glad? 	couldn't I be glading?
couldn't you be glading?
couldn't he be glading?
couldn't we be glading?
couldn't you be glading?
couldn't they be glading? 	couldn't I have gladed?
couldn't you have gladed?
couldn't he have gladed?
couldn't we have gladed?
couldn't you have gladed?
couldn't they have gladed? 	couldn't I have been glading?
couldn't you have been glading?
couldn't he have been glading?
couldn't we have been glading?
couldn't you have been glading?
couldn't they have been glading?