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