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