must combust
Verbo regular: combust - combusted- combusted

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must combust
you must combust
he must combust
we must combust
you must combust
they must combust 	I must be combusting
you must be combusting
he must be combusting
we must be combusting
you must be combusting
they must be combusting	I must have combusted
you must have combusted
he must have combusted
we must have combusted
you must have combusted
they must have combusted	I must have been combusting
you must have been combusting
he must have been combusting
we must have been combusting
you must have been combusting
they must have been combusting	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not combust
you must not combust
he must not combust
we must not combust
you must not combust
they must not combust 	I must not be combusting
you must not be combusting
he must not be combusting
we must not be combusting
you must not be combusting
they must not be combusting	I must not have combusted
you must not have combusted
he must not have combusted
we must not have combusted
you must not have combusted
they must not have combusted	I must not have been combusting
you must not have been combusting
he must not have been combusting
we must not have been combusting
you must not have been combusting
they must not have been combusting	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I combust?
must you combust?
must he combust?
must we combust?
must you combust?
must they combust? 	must I be combusting?
must you be combusting?
must he be combusting?
must we be combusting?
must you be combusting?
must they be combusting? 	must I have combusted?
must you have combusted?
must he have combusted?
must we have combusted?
must you have combusted?
must they have combusted? 	must I have been combusting?
must you have been combusting?
must he have been combusting?
must we have been combusting?
must you have been combusting?
must they have been combusting? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not combust?
must you not combust?
must he not combust?
must we not combust?
must you not combust?
must they not combust? 	must I not be combusting?
must you not be combusting?
must he not be combusting?
must we not be combusting?
must you not be combusting?
must they not be combusting? 	must I not have combusted?
must you not have combusted?
must he not have combusted?
must we not have combusted?
must you not have combusted?
must they not have combusted? 	must I not have been combusting?
must you not have been combusting?
must he not have been combusting?
must we not have been combusting?
must you not have been combusting?
must they not have been combusting?