must bus
Verbo regular: bus - bussed- bussed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must bus
you must bus
he must bus
we must bus
you must bus
they must bus 	I must be bussing
you must be bussing
he must be bussing
we must be bussing
you must be bussing
they must be bussing	I must have bussed
you must have bussed
he must have bussed
we must have bussed
you must have bussed
they must have bussed	I must have been bussing
you must have been bussing
he must have been bussing
we must have been bussing
you must have been bussing
they must have been bussing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not bus
you must not bus
he must not bus
we must not bus
you must not bus
they must not bus 	I must not be bussing
you must not be bussing
he must not be bussing
we must not be bussing
you must not be bussing
they must not be bussing	I must not have bussed
you must not have bussed
he must not have bussed
we must not have bussed
you must not have bussed
they must not have bussed	I must not have been bussing
you must not have been bussing
he must not have been bussing
we must not have been bussing
you must not have been bussing
they must not have been bussing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I bus?
must you bus?
must he bus?
must we bus?
must you bus?
must they bus? 	must I be bussing?
must you be bussing?
must he be bussing?
must we be bussing?
must you be bussing?
must they be bussing? 	must I have bussed?
must you have bussed?
must he have bussed?
must we have bussed?
must you have bussed?
must they have bussed? 	must I have been bussing?
must you have been bussing?
must he have been bussing?
must we have been bussing?
must you have been bussing?
must they have been bussing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not bus?
must you not bus?
must he not bus?
must we not bus?
must you not bus?
must they not bus? 	must I not be bussing?
must you not be bussing?
must he not be bussing?
must we not be bussing?
must you not be bussing?
must they not be bussing? 	must I not have bussed?
must you not have bussed?
must he not have bussed?
must we not have bussed?
must you not have bussed?
must they not have bussed? 	must I not have been bussing?
must you not have been bussing?
must he not have been bussing?
must we not have been bussing?
must you not have been bussing?
must they not have been bussing?