English verb conjugation
COULD BUG

Regular verb: bug - bugged - bugged

Affirmation

Simple form	V-ing form
I could bug you could bug he could bug we could bug you could bug they could bug	I could be bugging you could be bugging he could be bugging we could be bugging you could be bugging they could be bugging
Perfect	V-ing perfect
I could have bugged you could have bugged he could have bugged we could have bugged you could have bugged they could have bugged	I could have been bugging you could have been bugging he could have been bugging we could have been bugging you could have been bugging they could have been bugging

Negation

Simple form	V-ing form
I could not bug you could not bug he could not bug we could not bug you could not bug they could not bug	I could not be bugging you could not be bugging he could not be bugging we could not be bugging you could not be bugging they could not be bugging
Perfect	V-ing perfect
I could not have bugged you could not have bugged he could not have bugged we could not have bugged you could not have bugged they could not have bugged	I could not have been bugging you could not have been bugging he could not have been bugging we could not have been bugging you could not have been bugging they could not have been bugging

Interrogative form

Simple form	V-ing form
could I bug? could you bug? could he bug? could we bug? could you bug? could they bug?	could I be bugging? could you be bugging? could he be bugging? could we be bugging? could you be bugging? could they be bugging?
Perfect	V-ing perfect
could I have bugged? could you have bugged? could he have bugged? could we have bugged? could you have bugged? could they have bugged?	could I have been bugging? could you have been bugging? could he have been bugging? could we have been bugging? could you have been bugging? could they have been bugging?

Interro-negative form

Simple form	V-ing form
could I not bug? could you not bug? could he not bug? could we not bug? could you not bug? could they not bug?	could I not be bugging? could you not be bugging? could he not be bugging? could we not be bugging? could you not be bugging? could they not be bugging?
Perfect	V-ing perfect
could I not have bugged? could you not have bugged? could he not have bugged? could we not have bugged? could you not have bugged? could they not have bugged?	could I not have been bugging? could you not have been bugging? could he not have been bugging? could we not have been bugging? could you not have been bugging? could they not have been bugging?