English verb conjugation
COULD SLEDGEHAMMER

Regular verb: sledgehammer - sledgehammered - sledgehammered

Affirmation

Simple form	V-ing form
I could sledgehammer you could sledgehammer he could sledgehammer we could sledgehammer you could sledgehammer they could sledgehammer	I could be sledgehammering you could be sledgehammering he could be sledgehammering we could be sledgehammering you could be sledgehammering they could be sledgehammering
Perfect	V-ing perfect
I could have sledgehammered you could have sledgehammered he could have sledgehammered we could have sledgehammered you could have sledgehammered they could have sledgehammered	I could have been sledgehammering you could have been sledgehammering he could have been sledgehammering we could have been sledgehammering you could have been sledgehammering they could have been sledgehammering

Negation

Simple form	V-ing form
I could not sledgehammer you could not sledgehammer he could not sledgehammer we could not sledgehammer you could not sledgehammer they could not sledgehammer	I could not be sledgehammering you could not be sledgehammering he could not be sledgehammering we could not be sledgehammering you could not be sledgehammering they could not be sledgehammering
Perfect	V-ing perfect
I could not have sledgehammered you could not have sledgehammered he could not have sledgehammered we could not have sledgehammered you could not have sledgehammered they could not have sledgehammered	I could not have been sledgehammering you could not have been sledgehammering he could not have been sledgehammering we could not have been sledgehammering you could not have been sledgehammering they could not have been sledgehammering

Interrogative form

Simple form	V-ing form
could I sledgehammer? could you sledgehammer? could he sledgehammer? could we sledgehammer? could you sledgehammer? could they sledgehammer?	could I be sledgehammering? could you be sledgehammering? could he be sledgehammering? could we be sledgehammering? could you be sledgehammering? could they be sledgehammering?
Perfect	V-ing perfect
could I have sledgehammered? could you have sledgehammered? could he have sledgehammered? could we have sledgehammered? could you have sledgehammered? could they have sledgehammered?	could I have been sledgehammering? could you have been sledgehammering? could he have been sledgehammering? could we have been sledgehammering? could you have been sledgehammering? could they have been sledgehammering?

Interro-negative form

Simple form	V-ing form
could I not sledgehammer? could you not sledgehammer? could he not sledgehammer? could we not sledgehammer? could you not sledgehammer? could they not sledgehammer?	could I not be sledgehammering? could you not be sledgehammering? could he not be sledgehammering? could we not be sledgehammering? could you not be sledgehammering? could they not be sledgehammering?
Perfect	V-ing perfect
could I not have sledgehammered? could you not have sledgehammered? could he not have sledgehammered? could we not have sledgehammered? could you not have sledgehammered? could they not have sledgehammered?	could I not have been sledgehammering? could you not have been sledgehammering? could he not have been sledgehammering? could we not have been sledgehammering? could you not have been sledgehammering? could they not have been sledgehammering?