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 couldn't mug you couldn't mug he couldn't mug we couldn't mug you couldn't mug they couldn't mug	I couldn't be mugging you couldn't be mugging he couldn't be mugging we couldn't be mugging you couldn't be mugging they couldn't be mugging
Perfect	V-ing perfect
I couldn't have mugged you couldn't have mugged he couldn't have mugged we couldn't have mugged you couldn't have mugged they couldn't have mugged	I couldn't have been mugging you couldn't have been mugging he couldn't have been mugging we couldn't have been mugging you couldn't have been mugging they couldn't 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
couldn't I mug? couldn't you mug? couldn't he mug? couldn't we mug? couldn't you mug? couldn't they mug?	couldn't I be mugging? couldn't you be mugging? couldn't he be mugging? couldn't we be mugging? couldn't you be mugging? couldn't they be mugging?
Perfect	V-ing perfect
couldn't I have mugged? couldn't you have mugged? couldn't he have mugged? couldn't we have mugged? couldn't you have mugged? couldn't they have mugged?	couldn't I have been mugging? couldn't you have been mugging? couldn't he have been mugging? couldn't we have been mugging? couldn't you have been mugging? couldn't they have been mugging?