I must wind you must wind he must wind we must wind you must wind they must wind
V-ing form
I must be winding you must be winding he must be winding we must be winding you must be winding they must be winding
Perfect
I must have wound you must have wound he must have wound we must have wound you must have wound they must have wound
V-ing perfect
I must have been winding you must have been winding he must have been winding we must have been winding you must have been winding they must have been winding
Negation
Simple form
I mustn't wind you mustn't wind he mustn't wind we mustn't wind you mustn't wind they mustn't wind
V-ing form
I mustn't be winding you mustn't be winding he mustn't be winding we mustn't be winding you mustn't be winding they mustn't be winding
Perfect
I mustn't have wound you mustn't have wound he mustn't have wound we mustn't have wound you mustn't have wound they mustn't have wound
V-ing perfect
I mustn't have been winding you mustn't have been winding he mustn't have been winding we mustn't have been winding you mustn't have been winding they mustn't have been winding
Interrogative form
Simple form
must I wind? must you wind? must he wind? must we wind? must you wind? must they wind?
V-ing form
must I be winding? must you be winding? must he be winding? must we be winding? must you be winding? must they be winding?
Perfect
must I have wound? must you have wound? must he have wound? must we have wound? must you have wound? must they have wound?
V-ing perfect
must I have been winding? must you have been winding? must he have been winding? must we have been winding? must you have been winding? must they have been winding?
Interro-negative form
Simple form
mustn't I wind? mustn't you wind? mustn't he wind? mustn't we wind? mustn't you wind? mustn't they wind?
V-ing form
mustn't I be winding? mustn't you be winding? mustn't he be winding? mustn't we be winding? mustn't you be winding? mustn't they be winding?
Perfect
mustn't I have wound? mustn't you have wound? mustn't he have wound? mustn't we have wound? mustn't you have wound? mustn't they have wound?
V-ing perfect
mustn't I have been winding? mustn't you have been winding? mustn't he have been winding? mustn't we have been winding? mustn't you have been winding? mustn't they have been winding?