English verb conjugation
COULD HARM

Regular verb: harm - harmed - harmed

Affirmation

Simple form	V-ing form
I could harm you could harm he could harm we could harm you could harm they could harm	I could be harming you could be harming he could be harming we could be harming you could be harming they could be harming
Perfect	V-ing perfect
I could have harmed you could have harmed he could have harmed we could have harmed you could have harmed they could have harmed	I could have been harming you could have been harming he could have been harming we could have been harming you could have been harming they could have been harming

Negation

Simple form	V-ing form
I could not harm you could not harm he could not harm we could not harm you could not harm they could not harm	I could not be harming you could not be harming he could not be harming we could not be harming you could not be harming they could not be harming
Perfect	V-ing perfect
I could not have harmed you could not have harmed he could not have harmed we could not have harmed you could not have harmed they could not have harmed	I could not have been harming you could not have been harming he could not have been harming we could not have been harming you could not have been harming they could not have been harming

Interrogative form

Simple form	V-ing form
could I harm? could you harm? could he harm? could we harm? could you harm? could they harm?	could I be harming? could you be harming? could he be harming? could we be harming? could you be harming? could they be harming?
Perfect	V-ing perfect
could I have harmed? could you have harmed? could he have harmed? could we have harmed? could you have harmed? could they have harmed?	could I have been harming? could you have been harming? could he have been harming? could we have been harming? could you have been harming? could they have been harming?

Interro-negative form

Simple form	V-ing form
could I not harm? could you not harm? could he not harm? could we not harm? could you not harm? could they not harm?	could I not be harming? could you not be harming? could he not be harming? could we not be harming? could you not be harming? could they not be harming?
Perfect	V-ing perfect
could I not have harmed? could you not have harmed? could he not have harmed? could we not have harmed? could you not have harmed? could they not have harmed?	could I not have been harming? could you not have been harming? could he not have been harming? could we not have been harming? could you not have been harming? could they not have been harming?