must vapour
Verbo regular: vapour - vapoured- vapoured

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must vapour
you must vapour
he must vapour
we must vapour
you must vapour
they must vapour 	I must be vapouring
you must be vapouring
he must be vapouring
we must be vapouring
you must be vapouring
they must be vapouring	I must have vapoured
you must have vapoured
he must have vapoured
we must have vapoured
you must have vapoured
they must have vapoured	I must have been vapouring
you must have been vapouring
he must have been vapouring
we must have been vapouring
you must have been vapouring
they must have been vapouring	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not vapour
you must not vapour
he must not vapour
we must not vapour
you must not vapour
they must not vapour 	I must not be vapouring
you must not be vapouring
he must not be vapouring
we must not be vapouring
you must not be vapouring
they must not be vapouring	I must not have vapoured
you must not have vapoured
he must not have vapoured
we must not have vapoured
you must not have vapoured
they must not have vapoured	I must not have been vapouring
you must not have been vapouring
he must not have been vapouring
we must not have been vapouring
you must not have been vapouring
they must not have been vapouring	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I vapour?
must you vapour?
must he vapour?
must we vapour?
must you vapour?
must they vapour? 	must I be vapouring?
must you be vapouring?
must he be vapouring?
must we be vapouring?
must you be vapouring?
must they be vapouring? 	must I have vapoured?
must you have vapoured?
must he have vapoured?
must we have vapoured?
must you have vapoured?
must they have vapoured? 	must I have been vapouring?
must you have been vapouring?
must he have been vapouring?
must we have been vapouring?
must you have been vapouring?
must they have been vapouring? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not vapour?
must you not vapour?
must he not vapour?
must we not vapour?
must you not vapour?
must they not vapour? 	must I not be vapouring?
must you not be vapouring?
must he not be vapouring?
must we not be vapouring?
must you not be vapouring?
must they not be vapouring? 	must I not have vapoured?
must you not have vapoured?
must he not have vapoured?
must we not have vapoured?
must you not have vapoured?
must they not have vapoured? 	must I not have been vapouring?
must you not have been vapouring?
must he not have been vapouring?
must we not have been vapouring?
must you not have been vapouring?
must they not have been vapouring?