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 could not unjam you could not unjam he could not unjam we could not unjam you could not unjam they could not unjam	I could not be unjaming you could not be unjaming he could not be unjaming we could not be unjaming you could not be unjaming they could not be unjaming
Perfect	V-ing perfect
I could not have unjamed you could not have unjamed he could not have unjamed we could not have unjamed you could not have unjamed they could not have unjamed	I could not have been unjaming you could not have been unjaming he could not have been unjaming we could not have been unjaming you could not have been unjaming they could not 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
could I not unjam? could you not unjam? could he not unjam? could we not unjam? could you not unjam? could they not unjam?	could I not be unjaming? could you not be unjaming? could he not be unjaming? could we not be unjaming? could you not be unjaming? could they not be unjaming?
Perfect	V-ing perfect
could I not have unjamed? could you not have unjamed? could he not have unjamed? could we not have unjamed? could you not have unjamed? could they not have unjamed?	could I not have been unjaming? could you not have been unjaming? could he not have been unjaming? could we not have been unjaming? could you not have been unjaming? could they not have been unjaming?