English verb conjugation
CAN SWAN

Regular verb: swan - swaned - swaned

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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