could de-ice
Regular verb: de-ice - de-iced- de-iced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could de-ice
you could de-ice
he could de-ice
we could de-ice
you could de-ice
they could de-ice 	I could be de-icing
you could be de-icing
he could be de-icing
we could be de-icing
you could be de-icing
they could be de-icing	I could have de-iced
you could have de-iced
he could have de-iced
we could have de-iced
you could have de-iced
they could have de-iced	I could have been de-icing
you could have been de-icing
he could have been de-icing
we could have been de-icing
you could have been de-icing
they could have been de-icing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't de-ice
you couldn't de-ice
he couldn't de-ice
we couldn't de-ice
you couldn't de-ice
they couldn't de-ice 	I couldn't be de-icing
you couldn't be de-icing
he couldn't be de-icing
we couldn't be de-icing
you couldn't be de-icing
they couldn't be de-icing	I couldn't have de-iced
you couldn't have de-iced
he couldn't have de-iced
we couldn't have de-iced
you couldn't have de-iced
they couldn't have de-iced	I couldn't have been de-icing
you couldn't have been de-icing
he couldn't have been de-icing
we couldn't have been de-icing
you couldn't have been de-icing
they couldn't have been de-icing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I de-ice?
could you de-ice?
could he de-ice?
could we de-ice?
could you de-ice?
could they de-ice? 	could I be de-icing?
could you be de-icing?
could he be de-icing?
could we be de-icing?
could you be de-icing?
could they be de-icing? 	could I have de-iced?
could you have de-iced?
could he have de-iced?
could we have de-iced?
could you have de-iced?
could they have de-iced? 	could I have been de-icing?
could you have been de-icing?
could he have been de-icing?
could we have been de-icing?
could you have been de-icing?
could they have been de-icing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I de-ice?
couldn't you de-ice?
couldn't he de-ice?
couldn't we de-ice?
couldn't you de-ice?
couldn't they de-ice? 	couldn't I be de-icing?
couldn't you be de-icing?
couldn't he be de-icing?
couldn't we be de-icing?
couldn't you be de-icing?
couldn't they be de-icing? 	couldn't I have de-iced?
couldn't you have de-iced?
couldn't he have de-iced?
couldn't we have de-iced?
couldn't you have de-iced?
couldn't they have de-iced? 	couldn't I have been de-icing?
couldn't you have been de-icing?
couldn't he have been de-icing?
couldn't we have been de-icing?
couldn't you have been de-icing?
couldn't they have been de-icing?