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 couldn't slipcover you couldn't slipcover he couldn't slipcover we couldn't slipcover you couldn't slipcover they couldn't slipcover	I couldn't be slipcovering you couldn't be slipcovering he couldn't be slipcovering we couldn't be slipcovering you couldn't be slipcovering they couldn't be slipcovering
Perfect	V-ing perfect
I couldn't have slipcovered you couldn't have slipcovered he couldn't have slipcovered we couldn't have slipcovered you couldn't have slipcovered they couldn't have slipcovered	I couldn't have been slipcovering you couldn't have been slipcovering he couldn't have been slipcovering we couldn't have been slipcovering you couldn't have been slipcovering they couldn't 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
couldn't I slipcover? couldn't you slipcover? couldn't he slipcover? couldn't we slipcover? couldn't you slipcover? couldn't they slipcover?	couldn't I be slipcovering? couldn't you be slipcovering? couldn't he be slipcovering? couldn't we be slipcovering? couldn't you be slipcovering? couldn't they be slipcovering?
Perfect	V-ing perfect
couldn't I have slipcovered? couldn't you have slipcovered? couldn't he have slipcovered? couldn't we have slipcovered? couldn't you have slipcovered? couldn't they have slipcovered?	couldn't I have been slipcovering? couldn't you have been slipcovering? couldn't he have been slipcovering? couldn't we have been slipcovering? couldn't you have been slipcovering? couldn't they have been slipcovering?