I can slipcover you can slipcover he can slipcover we can slipcover you can slipcover they can slipcover
V-ing form
I can be slipcovering you can be slipcovering he can be slipcovering we can be slipcovering you can be slipcovering they can be slipcovering
Perfect
I can have slipcovered you can have slipcovered he can have slipcovered we can have slipcovered you can have slipcovered they can have slipcovered
V-ing perfect
I can have been slipcovering you can have been slipcovering he can have been slipcovering we can have been slipcovering you can have been slipcovering they can have been slipcovering
Negation
Simple form
I cannot slipcover you cannot slipcover he cannot slipcover we cannot slipcover you cannot slipcover they cannot slipcover
V-ing form
I cannot be slipcovering you cannot be slipcovering he cannot be slipcovering we cannot be slipcovering you cannot be slipcovering they cannot be slipcovering
Perfect
I cannot have slipcovered you cannot have slipcovered he cannot have slipcovered we cannot have slipcovered you cannot have slipcovered they cannot have slipcovered
V-ing perfect
I cannot have been slipcovering you cannot have been slipcovering he cannot have been slipcovering we cannot have been slipcovering you cannot have been slipcovering they cannot have been slipcovering
Interrogative form
Simple form
can I slipcover? can you slipcover? can he slipcover? can we slipcover? can you slipcover? can they slipcover?
V-ing form
can I be slipcovering? can you be slipcovering? can he be slipcovering? can we be slipcovering? can you be slipcovering? can they be slipcovering?
Perfect
can I have slipcovered? can you have slipcovered? can he have slipcovered? can we have slipcovered? can you have slipcovered? can they have slipcovered?
V-ing perfect
can I have been slipcovering? can you have been slipcovering? can he have been slipcovering? can we have been slipcovering? can you have been slipcovering? can they have been slipcovering?
Interro-negative form
Simple form
can I not slipcover? can you not slipcover? can he not slipcover? can we not slipcover? can you not slipcover? can they not slipcover?
V-ing form
can I not be slipcovering? can you not be slipcovering? can he not be slipcovering? can we not be slipcovering? can you not be slipcovering? can they not be slipcovering?
Perfect
can I not have slipcovered? can you not have slipcovered? can he not have slipcovered? can we not have slipcovered? can you not have slipcovered? can they not have slipcovered?
V-ing perfect
can I not have been slipcovering? can you not have been slipcovering? can he not have been slipcovering? can we not have been slipcovering? can you not have been slipcovering? can they not have been slipcovering?