English verb conjugation
MUST SWAN

Regular verb: swan - swaned - swaned

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Negation

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

Interro-negative form

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