English verb conjugation
COULD MUG

Regular verb: mug - mugged - mugged

Affirmation

Simple form	V-ing form
I could mug you could mug he could mug we could mug you could mug they could mug	I could be mugging you could be mugging he could be mugging we could be mugging you could be mugging they could be mugging
Perfect	V-ing perfect
I could have mugged you could have mugged he could have mugged we could have mugged you could have mugged they could have mugged	I could have been mugging you could have been mugging he could have been mugging we could have been mugging you could have been mugging they could have been mugging

Negation

Simple form	V-ing form
I could not mug you could not mug he could not mug we could not mug you could not mug they could not mug	I could not be mugging you could not be mugging he could not be mugging we could not be mugging you could not be mugging they could not be mugging
Perfect	V-ing perfect
I could not have mugged you could not have mugged he could not have mugged we could not have mugged you could not have mugged they could not have mugged	I could not have been mugging you could not have been mugging he could not have been mugging we could not have been mugging you could not have been mugging they could not have been mugging

Interrogative form

Simple form	V-ing form
could I mug? could you mug? could he mug? could we mug? could you mug? could they mug?	could I be mugging? could you be mugging? could he be mugging? could we be mugging? could you be mugging? could they be mugging?
Perfect	V-ing perfect
could I have mugged? could you have mugged? could he have mugged? could we have mugged? could you have mugged? could they have mugged?	could I have been mugging? could you have been mugging? could he have been mugging? could we have been mugging? could you have been mugging? could they have been mugging?

Interro-negative form

Simple form	V-ing form
could I not mug? could you not mug? could he not mug? could we not mug? could you not mug? could they not mug?	could I not be mugging? could you not be mugging? could he not be mugging? could we not be mugging? could you not be mugging? could they not be mugging?
Perfect	V-ing perfect
could I not have mugged? could you not have mugged? could he not have mugged? could we not have mugged? could you not have mugged? could they not have mugged?	could I not have been mugging? could you not have been mugging? could he not have been mugging? could we not have been mugging? could you not have been mugging? could they not have been mugging?