English verb conjugation
COULD CRUST

Regular verb: crust - crusted - crusted

Affirmation

Simple form	V-ing form
I could crust you could crust she could crust we could crust you could crust they could crust	I could be crusting you could be crusting she could be crusting we could be crusting you could be crusting they could be crusting
Perfect	V-ing perfect
I could have crusted you could have crusted she could have crusted we could have crusted you could have crusted they could have crusted	I could have been crusting you could have been crusting she could have been crusting we could have been crusting you could have been crusting they could have been crusting

Negation

Simple form	V-ing form
I couldn't crust you couldn't crust she couldn't crust we couldn't crust you couldn't crust they couldn't crust	I couldn't be crusting you couldn't be crusting she couldn't be crusting we couldn't be crusting you couldn't be crusting they couldn't be crusting
Perfect	V-ing perfect
I couldn't have crusted you couldn't have crusted she couldn't have crusted we couldn't have crusted you couldn't have crusted they couldn't have crusted	I couldn't have been crusting you couldn't have been crusting she couldn't have been crusting we couldn't have been crusting you couldn't have been crusting they couldn't have been crusting

Interrogative form

Simple form	V-ing form
could I crust? could you crust? could she crust? could we crust? could you crust? could they crust?	could I be crusting? could you be crusting? could she be crusting? could we be crusting? could you be crusting? could they be crusting?
Perfect	V-ing perfect
could I have crusted? could you have crusted? could she have crusted? could we have crusted? could you have crusted? could they have crusted?	could I have been crusting? could you have been crusting? could she have been crusting? could we have been crusting? could you have been crusting? could they have been crusting?

Interro-negative form

Simple form	V-ing form
couldn't I crust? couldn't you crust? couldn't she crust? couldn't we crust? couldn't you crust? couldn't they crust?	couldn't I be crusting? couldn't you be crusting? couldn't she be crusting? couldn't we be crusting? couldn't you be crusting? couldn't they be crusting?
Perfect	V-ing perfect
couldn't I have crusted? couldn't you have crusted? couldn't she have crusted? couldn't we have crusted? couldn't you have crusted? couldn't they have crusted?	couldn't I have been crusting? couldn't you have been crusting? couldn't she have been crusting? couldn't we have been crusting? couldn't you have been crusting? couldn't they have been crusting?