English verb conjugation
COULD UNJAM

Regular verb: unjam - unjamed - unjamed

Affirmation

Simple form	V-ing form
I could unjam you could unjam he could unjam we could unjam you could unjam they could unjam	I could be unjaming you could be unjaming he could be unjaming we could be unjaming you could be unjaming they could be unjaming
Perfect	V-ing perfect
I could have unjamed you could have unjamed he could have unjamed we could have unjamed you could have unjamed they could have unjamed	I could have been unjaming you could have been unjaming he could have been unjaming we could have been unjaming you could have been unjaming they could have been unjaming

Negation

Simple form	V-ing form
I couldn't unjam you couldn't unjam he couldn't unjam we couldn't unjam you couldn't unjam they couldn't unjam	I couldn't be unjaming you couldn't be unjaming he couldn't be unjaming we couldn't be unjaming you couldn't be unjaming they couldn't be unjaming
Perfect	V-ing perfect
I couldn't have unjamed you couldn't have unjamed he couldn't have unjamed we couldn't have unjamed you couldn't have unjamed they couldn't have unjamed	I couldn't have been unjaming you couldn't have been unjaming he couldn't have been unjaming we couldn't have been unjaming you couldn't have been unjaming they couldn't have been unjaming

Interrogative form

Simple form	V-ing form
could I unjam? could you unjam? could he unjam? could we unjam? could you unjam? could they unjam?	could I be unjaming? could you be unjaming? could he be unjaming? could we be unjaming? could you be unjaming? could they be unjaming?
Perfect	V-ing perfect
could I have unjamed? could you have unjamed? could he have unjamed? could we have unjamed? could you have unjamed? could they have unjamed?	could I have been unjaming? could you have been unjaming? could he have been unjaming? could we have been unjaming? could you have been unjaming? could they have been unjaming?

Interro-negative form

Simple form	V-ing form
couldn't I unjam? couldn't you unjam? couldn't he unjam? couldn't we unjam? couldn't you unjam? couldn't they unjam?	couldn't I be unjaming? couldn't you be unjaming? couldn't he be unjaming? couldn't we be unjaming? couldn't you be unjaming? couldn't they be unjaming?
Perfect	V-ing perfect
couldn't I have unjamed? couldn't you have unjamed? couldn't he have unjamed? couldn't we have unjamed? couldn't you have unjamed? couldn't they have unjamed?	couldn't I have been unjaming? couldn't you have been unjaming? couldn't he have been unjaming? couldn't we have been unjaming? couldn't you have been unjaming? couldn't they have been unjaming?