must swan
Verbo regular: swan - swaned- swaned

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must swan
you must swan
he must swan
we must swan
you must swan
they must swan 	I must be swaning
you must be swaning
he must be swaning
we must be swaning
you must be swaning
they must be swaning	I must have swaned
you must have swaned
he must have swaned
we must have swaned
you must have swaned
they must have swaned	I must have been swaning
you must have been swaning
he must have been swaning
we must have been swaning
you must have been swaning
they must have been swaning	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not swan
you must not swan
he must not swan
we must not swan
you must not swan
they must not swan 	I must not be swaning
you must not be swaning
he must not be swaning
we must not be swaning
you must not be swaning
they must not be swaning	I must not have swaned
you must not have swaned
he must not have swaned
we must not have swaned
you must not have swaned
they must not have swaned	I must not have been swaning
you must not have been swaning
he must not have been swaning
we must not have been swaning
you must not have been swaning
they must not have been swaning	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I swan?
must you swan?
must he swan?
must we swan?
must you swan?
must they swan? 	must I be swaning?
must you be swaning?
must he be swaning?
must we be swaning?
must you be swaning?
must they be swaning? 	must I have swaned?
must you have swaned?
must he have swaned?
must we have swaned?
must you have swaned?
must they have swaned? 	must I have been swaning?
must you have been swaning?
must he have been swaning?
must we have been swaning?
must you have been swaning?
must they have been swaning? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not swan?
must you not swan?
must he not swan?
must we not swan?
must you not swan?
must they not swan? 	must I not be swaning?
must you not be swaning?
must he not be swaning?
must we not be swaning?
must you not be swaning?
must they not be swaning? 	must I not have swaned?
must you not have swaned?
must he not have swaned?
must we not have swaned?
must you not have swaned?
must they not have swaned? 	must I not have been swaning?
must you not have been swaning?
must he not have been swaning?
must we not have been swaning?
must you not have been swaning?
must they not have been swaning?