English verb conjugation
MUST OVERWINTER

Regular verb: overwinter - overwintered - overwintered

Affirmation

Simple form	V-ing form
I must overwinter you must overwinter he must overwinter we must overwinter you must overwinter they must overwinter	I must be overwintering you must be overwintering he must be overwintering we must be overwintering you must be overwintering they must be overwintering
Perfect	V-ing perfect
I must have overwintered you must have overwintered he must have overwintered we must have overwintered you must have overwintered they must have overwintered	I must have been overwintering you must have been overwintering he must have been overwintering we must have been overwintering you must have been overwintering they must have been overwintering

Negation

Simple form	V-ing form
I mustn't overwinter you mustn't overwinter he mustn't overwinter we mustn't overwinter you mustn't overwinter they mustn't overwinter	I mustn't be overwintering you mustn't be overwintering he mustn't be overwintering we mustn't be overwintering you mustn't be overwintering they mustn't be overwintering
Perfect	V-ing perfect
I mustn't have overwintered you mustn't have overwintered he mustn't have overwintered we mustn't have overwintered you mustn't have overwintered they mustn't have overwintered	I mustn't have been overwintering you mustn't have been overwintering he mustn't have been overwintering we mustn't have been overwintering you mustn't have been overwintering they mustn't have been overwintering

Interrogative form

Simple form	V-ing form
must I overwinter? must you overwinter? must he overwinter? must we overwinter? must you overwinter? must they overwinter?	must I be overwintering? must you be overwintering? must he be overwintering? must we be overwintering? must you be overwintering? must they be overwintering?
Perfect	V-ing perfect
must I have overwintered? must you have overwintered? must he have overwintered? must we have overwintered? must you have overwintered? must they have overwintered?	must I have been overwintering? must you have been overwintering? must he have been overwintering? must we have been overwintering? must you have been overwintering? must they have been overwintering?

Interro-negative form

Simple form	V-ing form
mustn't I overwinter? mustn't you overwinter? mustn't he overwinter? mustn't we overwinter? mustn't you overwinter? mustn't they overwinter?	mustn't I be overwintering? mustn't you be overwintering? mustn't he be overwintering? mustn't we be overwintering? mustn't you be overwintering? mustn't they be overwintering?
Perfect	V-ing perfect
mustn't I have overwintered? mustn't you have overwintered? mustn't he have overwintered? mustn't we have overwintered? mustn't you have overwintered? mustn't they have overwintered?	mustn't I have been overwintering? mustn't you have been overwintering? mustn't he have been overwintering? mustn't we have been overwintering? mustn't you have been overwintering? mustn't they have been overwintering?