I can pilfer you can pilfer he can pilfer we can pilfer you can pilfer they can pilfer
V-ing form
I can be pilfering you can be pilfering he can be pilfering we can be pilfering you can be pilfering they can be pilfering
Perfect
I can have pilfered you can have pilfered he can have pilfered we can have pilfered you can have pilfered they can have pilfered
V-ing perfect
I can have been pilfering you can have been pilfering he can have been pilfering we can have been pilfering you can have been pilfering they can have been pilfering
Negation
Simple form
I cannot pilfer you cannot pilfer he cannot pilfer we cannot pilfer you cannot pilfer they cannot pilfer
V-ing form
I cannot be pilfering you cannot be pilfering he cannot be pilfering we cannot be pilfering you cannot be pilfering they cannot be pilfering
Perfect
I cannot have pilfered you cannot have pilfered he cannot have pilfered we cannot have pilfered you cannot have pilfered they cannot have pilfered
V-ing perfect
I cannot have been pilfering you cannot have been pilfering he cannot have been pilfering we cannot have been pilfering you cannot have been pilfering they cannot have been pilfering
Interrogative form
Simple form
can I pilfer? can you pilfer? can he pilfer? can we pilfer? can you pilfer? can they pilfer?
V-ing form
can I be pilfering? can you be pilfering? can he be pilfering? can we be pilfering? can you be pilfering? can they be pilfering?
Perfect
can I have pilfered? can you have pilfered? can he have pilfered? can we have pilfered? can you have pilfered? can they have pilfered?
V-ing perfect
can I have been pilfering? can you have been pilfering? can he have been pilfering? can we have been pilfering? can you have been pilfering? can they have been pilfering?
Interro-negative form
Simple form
can I not pilfer? can you not pilfer? can he not pilfer? can we not pilfer? can you not pilfer? can they not pilfer?
V-ing form
can I not be pilfering? can you not be pilfering? can he not be pilfering? can we not be pilfering? can you not be pilfering? can they not be pilfering?
Perfect
can I not have pilfered? can you not have pilfered? can he not have pilfered? can we not have pilfered? can you not have pilfered? can they not have pilfered?
V-ing perfect
can I not have been pilfering? can you not have been pilfering? can he not have been pilfering? can we not have been pilfering? can you not have been pilfering? can they not have been pilfering?