must gust
Regular verb: gust - gusted- gusted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
I must not gust
you must not gust
he must not gust
we must not gust
you must not gust
they must not gust 	I must not be gusting
you must not be gusting
he must not be gusting
we must not be gusting
you must not be gusting
they must not be gusting	I must not have gusted
you must not have gusted
he must not have gusted
we must not have gusted
you must not have gusted
they must not have gusted	I must not have been gusting
you must not have been gusting
he must not have been gusting
we must not have been gusting
you must not have been gusting
they must not have been gusting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
must I not gust?
must you not gust?
must he not gust?
must we not gust?
must you not gust?
must they not gust? 	must I not be gusting?
must you not be gusting?
must he not be gusting?
must we not be gusting?
must you not be gusting?
must they not be gusting? 	must I not have gusted?
must you not have gusted?
must he not have gusted?
must we not have gusted?
must you not have gusted?
must they not have gusted? 	must I not have been gusting?
must you not have been gusting?
must he not have been gusting?
must we not have been gusting?
must you not have been gusting?
must they not have been gusting?