English verb conjugation
MUST PILFER

Regular verb: pilfer - pilfered - pilfered

Affirmation

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

Negation

Simple form	V-ing form
I must not pilfer you must not pilfer he must not pilfer we must not pilfer you must not pilfer they must not pilfer	I must not be pilfering you must not be pilfering he must not be pilfering we must not be pilfering you must not be pilfering they must not be pilfering
Perfect	V-ing perfect
I must not have pilfered you must not have pilfered he must not have pilfered we must not have pilfered you must not have pilfered they must not have pilfered	I must not have been pilfering you must not have been pilfering he must not have been pilfering we must not have been pilfering you must not have been pilfering they must not have been pilfering

Interrogative form

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

Interro-negative form

Simple form	V-ing form
must I not pilfer? must you not pilfer? must he not pilfer? must we not pilfer? must you not pilfer? must they not pilfer?	must I not be pilfering? must you not be pilfering? must he not be pilfering? must we not be pilfering? must you not be pilfering? must they not be pilfering?
Perfect	V-ing perfect
must I not have pilfered? must you not have pilfered? must he not have pilfered? must we not have pilfered? must you not have pilfered? must they not have pilfered?	must I not have been pilfering? must you not have been pilfering? must he not have been pilfering? must we not have been pilfering? must you not have been pilfering? must they not have been pilfering?