English verb conjugation
COULD ICE

Regular verb: ice - iced - iced

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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