could intergraft
Regular verb: intergraft - intergrafted- intergrafted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could intergraft
you could intergraft
he could intergraft
we could intergraft
you could intergraft
they could intergraft 	I could be intergrafting
you could be intergrafting
he could be intergrafting
we could be intergrafting
you could be intergrafting
they could be intergrafting	I could have intergrafted
you could have intergrafted
he could have intergrafted
we could have intergrafted
you could have intergrafted
they could have intergrafted	I could have been intergrafting
you could have been intergrafting
he could have been intergrafting
we could have been intergrafting
you could have been intergrafting
they could have been intergrafting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't intergraft
you couldn't intergraft
he couldn't intergraft
we couldn't intergraft
you couldn't intergraft
they couldn't intergraft 	I couldn't be intergrafting
you couldn't be intergrafting
he couldn't be intergrafting
we couldn't be intergrafting
you couldn't be intergrafting
they couldn't be intergrafting	I couldn't have intergrafted
you couldn't have intergrafted
he couldn't have intergrafted
we couldn't have intergrafted
you couldn't have intergrafted
they couldn't have intergrafted	I couldn't have been intergrafting
you couldn't have been intergrafting
he couldn't have been intergrafting
we couldn't have been intergrafting
you couldn't have been intergrafting
they couldn't have been intergrafting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I intergraft?
could you intergraft?
could he intergraft?
could we intergraft?
could you intergraft?
could they intergraft? 	could I be intergrafting?
could you be intergrafting?
could he be intergrafting?
could we be intergrafting?
could you be intergrafting?
could they be intergrafting? 	could I have intergrafted?
could you have intergrafted?
could he have intergrafted?
could we have intergrafted?
could you have intergrafted?
could they have intergrafted? 	could I have been intergrafting?
could you have been intergrafting?
could he have been intergrafting?
could we have been intergrafting?
could you have been intergrafting?
could they have been intergrafting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I intergraft?
couldn't you intergraft?
couldn't he intergraft?
couldn't we intergraft?
couldn't you intergraft?
couldn't they intergraft? 	couldn't I be intergrafting?
couldn't you be intergrafting?
couldn't he be intergrafting?
couldn't we be intergrafting?
couldn't you be intergrafting?
couldn't they be intergrafting? 	couldn't I have intergrafted?
couldn't you have intergrafted?
couldn't he have intergrafted?
couldn't we have intergrafted?
couldn't you have intergrafted?
couldn't they have intergrafted? 	couldn't I have been intergrafting?
couldn't you have been intergrafting?
couldn't he have been intergrafting?
couldn't we have been intergrafting?
couldn't you have been intergrafting?
couldn't they have been intergrafting?