English verb conjugation
COULD STUD

Regular verb: stud - studded - studded

Affirmation

Simple form	V-ing form
I could stud you could stud he could stud we could stud you could stud they could stud	I could be studding you could be studding he could be studding we could be studding you could be studding they could be studding
Perfect	V-ing perfect
I could have studded you could have studded he could have studded we could have studded you could have studded they could have studded	I could have been studding you could have been studding he could have been studding we could have been studding you could have been studding they could have been studding

Negation

Simple form	V-ing form
I could not stud you could not stud he could not stud we could not stud you could not stud they could not stud	I could not be studding you could not be studding he could not be studding we could not be studding you could not be studding they could not be studding
Perfect	V-ing perfect
I could not have studded you could not have studded he could not have studded we could not have studded you could not have studded they could not have studded	I could not have been studding you could not have been studding he could not have been studding we could not have been studding you could not have been studding they could not have been studding

Interrogative form

Simple form	V-ing form
could I stud? could you stud? could he stud? could we stud? could you stud? could they stud?	could I be studding? could you be studding? could he be studding? could we be studding? could you be studding? could they be studding?
Perfect	V-ing perfect
could I have studded? could you have studded? could he have studded? could we have studded? could you have studded? could they have studded?	could I have been studding? could you have been studding? could he have been studding? could we have been studding? could you have been studding? could they have been studding?

Interro-negative form

Simple form	V-ing form
could I not stud? could you not stud? could he not stud? could we not stud? could you not stud? could they not stud?	could I not be studding? could you not be studding? could he not be studding? could we not be studding? could you not be studding? could they not be studding?
Perfect	V-ing perfect
could I not have studded? could you not have studded? could he not have studded? could we not have studded? could you not have studded? could they not have studded?	could I not have been studding? could you not have been studding? could he not have been studding? could we not have been studding? could you not have been studding? could they not have been studding?