English verb conjugation
COULD PILFER

Regular verb: pilfer - pilfered - pilfered

Affirmation

Simple form	V-ing form
I could pilfer you could pilfer she could pilfer we could pilfer you could pilfer they could pilfer	I could be pilfering you could be pilfering she could be pilfering we could be pilfering you could be pilfering they could be pilfering
Perfect	V-ing perfect
I could have pilfered you could have pilfered she could have pilfered we could have pilfered you could have pilfered they could have pilfered	I could have been pilfering you could have been pilfering she could have been pilfering we could have been pilfering you could have been pilfering they could have been pilfering

Negation

Simple form	V-ing form
I couldn't pilfer you couldn't pilfer she couldn't pilfer we couldn't pilfer you couldn't pilfer they couldn't pilfer	I couldn't be pilfering you couldn't be pilfering she couldn't be pilfering we couldn't be pilfering you couldn't be pilfering they couldn't be pilfering
Perfect	V-ing perfect
I couldn't have pilfered you couldn't have pilfered she couldn't have pilfered we couldn't have pilfered you couldn't have pilfered they couldn't have pilfered	I couldn't have been pilfering you couldn't have been pilfering she couldn't have been pilfering we couldn't have been pilfering you couldn't have been pilfering they couldn't have been pilfering

Interrogative form

Simple form	V-ing form
could I pilfer? could you pilfer? could she pilfer? could we pilfer? could you pilfer? could they pilfer?	could I be pilfering? could you be pilfering? could she be pilfering? could we be pilfering? could you be pilfering? could they be pilfering?
Perfect	V-ing perfect
could I have pilfered? could you have pilfered? could she have pilfered? could we have pilfered? could you have pilfered? could they have pilfered?	could I have been pilfering? could you have been pilfering? could she have been pilfering? could we have been pilfering? could you have been pilfering? could they have been pilfering?

Interro-negative form

Simple form	V-ing form
couldn't I pilfer? couldn't you pilfer? couldn't she pilfer? couldn't we pilfer? couldn't you pilfer? couldn't they pilfer?	couldn't I be pilfering? couldn't you be pilfering? couldn't she be pilfering? couldn't we be pilfering? couldn't you be pilfering? couldn't they be pilfering?
Perfect	V-ing perfect
couldn't I have pilfered? couldn't you have pilfered? couldn't she have pilfered? couldn't we have pilfered? couldn't you have pilfered? couldn't they have pilfered?	couldn't I have been pilfering? couldn't you have been pilfering? couldn't she have been pilfering? couldn't we have been pilfering? couldn't you have been pilfering? couldn't they have been pilfering?