must travel
Verbo regular: travel - travelled- travelled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must travel
you must travel
he must travel
we must travel
you must travel
they must travel 	I must be travelling
you must be travelling
he must be travelling
we must be travelling
you must be travelling
they must be travelling	I must have travelled
you must have travelled
he must have travelled
we must have travelled
you must have travelled
they must have travelled	I must have been travelling
you must have been travelling
he must have been travelling
we must have been travelling
you must have been travelling
they must have been travelling	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not travel
you must not travel
he must not travel
we must not travel
you must not travel
they must not travel 	I must not be travelling
you must not be travelling
he must not be travelling
we must not be travelling
you must not be travelling
they must not be travelling	I must not have travelled
you must not have travelled
he must not have travelled
we must not have travelled
you must not have travelled
they must not have travelled	I must not have been travelling
you must not have been travelling
he must not have been travelling
we must not have been travelling
you must not have been travelling
they must not have been travelling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I travel?
must you travel?
must he travel?
must we travel?
must you travel?
must they travel? 	must I be travelling?
must you be travelling?
must he be travelling?
must we be travelling?
must you be travelling?
must they be travelling? 	must I have travelled?
must you have travelled?
must he have travelled?
must we have travelled?
must you have travelled?
must they have travelled? 	must I have been travelling?
must you have been travelling?
must he have been travelling?
must we have been travelling?
must you have been travelling?
must they have been travelling? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not travel?
must you not travel?
must he not travel?
must we not travel?
must you not travel?
must they not travel? 	must I not be travelling?
must you not be travelling?
must he not be travelling?
must we not be travelling?
must you not be travelling?
must they not be travelling? 	must I not have travelled?
must you not have travelled?
must he not have travelled?
must we not have travelled?
must you not have travelled?
must they not have travelled? 	must I not have been travelling?
must you not have been travelling?
must he not have been travelling?
must we not have been travelling?
must you not have been travelling?
must they not have been travelling?