English verb conjugation
MUST GUST

Regular verb: gust - gusted - gusted

Affirmation

Simple form	V-ing form
I must gust you must gust he must gust we must gust you must gust they must gust	I must be gusting you must be gusting he must be gusting we must be gusting you must be gusting they must be gusting
Perfect	V-ing perfect
I must have gusted you must have gusted he must have gusted we must have gusted you must have gusted they must have gusted	I must have been gusting you must have been gusting he must have been gusting we must have been gusting you must have been gusting they must have been gusting

Negation

Simple form	V-ing form
I mustn't gust you mustn't gust he mustn't gust we mustn't gust you mustn't gust they mustn't gust	I mustn't be gusting you mustn't be gusting he mustn't be gusting we mustn't be gusting you mustn't be gusting they mustn't be gusting
Perfect	V-ing perfect
I mustn't have gusted you mustn't have gusted he mustn't have gusted we mustn't have gusted you mustn't have gusted they mustn't have gusted	I mustn't have been gusting you mustn't have been gusting he mustn't have been gusting we mustn't have been gusting you mustn't have been gusting they mustn't have been gusting

Interrogative form

Simple form	V-ing form
must I gust? must you gust? must he gust? must we gust? must you gust? must they gust?	must I be gusting? must you be gusting? must he be gusting? must we be gusting? must you be gusting? must they be gusting?
Perfect	V-ing perfect
must I have gusted? must you have gusted? must he have gusted? must we have gusted? must you have gusted? must they have gusted?	must I have been gusting? must you have been gusting? must he have been gusting? must we have been gusting? must you have been gusting? must they have been gusting?

Interro-negative form

Simple form	V-ing form
mustn't I gust? mustn't you gust? mustn't he gust? mustn't we gust? mustn't you gust? mustn't they gust?	mustn't I be gusting? mustn't you be gusting? mustn't he be gusting? mustn't we be gusting? mustn't you be gusting? mustn't they be gusting?
Perfect	V-ing perfect
mustn't I have gusted? mustn't you have gusted? mustn't he have gusted? mustn't we have gusted? mustn't you have gusted? mustn't they have gusted?	mustn't I have been gusting? mustn't you have been gusting? mustn't he have been gusting? mustn't we have been gusting? mustn't you have been gusting? mustn't they have been gusting?