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 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
Perfect	V-ing perfect
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

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
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?
Perfect	V-ing perfect
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?