English verb conjugation
COULD SLIPCOVER

Regular verb: slipcover - slipcovered - slipcovered

Affirmation

Simple form	V-ing form
I could slipcover you could slipcover he could slipcover we could slipcover you could slipcover they could slipcover	I could be slipcovering you could be slipcovering he could be slipcovering we could be slipcovering you could be slipcovering they could be slipcovering
Perfect	V-ing perfect
I could have slipcovered you could have slipcovered he could have slipcovered we could have slipcovered you could have slipcovered they could have slipcovered	I could have been slipcovering you could have been slipcovering he could have been slipcovering we could have been slipcovering you could have been slipcovering they could have been slipcovering

Negation

Simple form	V-ing form
I could not slipcover you could not slipcover he could not slipcover we could not slipcover you could not slipcover they could not slipcover	I could not be slipcovering you could not be slipcovering he could not be slipcovering we could not be slipcovering you could not be slipcovering they could not be slipcovering
Perfect	V-ing perfect
I could not have slipcovered you could not have slipcovered he could not have slipcovered we could not have slipcovered you could not have slipcovered they could not have slipcovered	I could not have been slipcovering you could not have been slipcovering he could not have been slipcovering we could not have been slipcovering you could not have been slipcovering they could not have been slipcovering

Interrogative form

Simple form	V-ing form
could I slipcover? could you slipcover? could he slipcover? could we slipcover? could you slipcover? could they slipcover?	could I be slipcovering? could you be slipcovering? could he be slipcovering? could we be slipcovering? could you be slipcovering? could they be slipcovering?
Perfect	V-ing perfect
could I have slipcovered? could you have slipcovered? could he have slipcovered? could we have slipcovered? could you have slipcovered? could they have slipcovered?	could I have been slipcovering? could you have been slipcovering? could he have been slipcovering? could we have been slipcovering? could you have been slipcovering? could they have been slipcovering?

Interro-negative form

Simple form	V-ing form
could I not slipcover? could you not slipcover? could he not slipcover? could we not slipcover? could you not slipcover? could they not slipcover?	could I not be slipcovering? could you not be slipcovering? could he not be slipcovering? could we not be slipcovering? could you not be slipcovering? could they not be slipcovering?
Perfect	V-ing perfect
could I not have slipcovered? could you not have slipcovered? could he not have slipcovered? could we not have slipcovered? could you not have slipcovered? could they not have slipcovered?	could I not have been slipcovering? could you not have been slipcovering? could he not have been slipcovering? could we not have been slipcovering? could you not have been slipcovering? could they not have been slipcovering?