must swan
Regular verb: swan - swaned- swaned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must swan
you must swan
she must swan
we must swan
you must swan
they must swan 	I must be swaning
you must be swaning
she must be swaning
we must be swaning
you must be swaning
they must be swaning	I must have swaned
you must have swaned
she 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
she must have been swaning
we must have been swaning
you must have been swaning
they must have been swaning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't swan
you mustn't swan
she mustn't swan
we mustn't swan
you mustn't swan
they mustn't swan 	I mustn't be swaning
you mustn't be swaning
she mustn't be swaning
we mustn't be swaning
you mustn't be swaning
they mustn't be swaning	I mustn't have swaned
you mustn't have swaned
she mustn't have swaned
we mustn't have swaned
you mustn't have swaned
they mustn't have swaned	I mustn't have been swaning
you mustn't have been swaning
she mustn't have been swaning
we mustn't have been swaning
you mustn't have been swaning
they mustn't have been swaning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I swan?
must you swan?
must she swan?
must we swan?
must you swan?
must they swan? 	must I be swaning?
must you be swaning?
must she be swaning?
must we be swaning?
must you be swaning?
must they be swaning? 	must I have swaned?
must you have swaned?
must she 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 she have been swaning?
must we have been swaning?
must you have been swaning?
must they have been swaning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I swan?
mustn't you swan?
mustn't she swan?
mustn't we swan?
mustn't you swan?
mustn't they swan? 	mustn't I be swaning?
mustn't you be swaning?
mustn't she be swaning?
mustn't we be swaning?
mustn't you be swaning?
mustn't they be swaning? 	mustn't I have swaned?
mustn't you have swaned?
mustn't she have swaned?
mustn't we have swaned?
mustn't you have swaned?
mustn't they have swaned? 	mustn't I have been swaning?
mustn't you have been swaning?
mustn't she have been swaning?
mustn't we have been swaning?
mustn't you have been swaning?
mustn't they have been swaning?