can swan
Regular verb: swan - swaned- swaned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can swan
you can swan
he can swan
we can swan
you can swan
they can swan 	I can be swaning
you can be swaning
he can be swaning
we can be swaning
you can be swaning
they can be swaning	I can have swaned
you can have swaned
he 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
he 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 	Perfect 	V-ing perfect 	
I cannot swan
you cannot swan
he cannot swan
we cannot swan
you cannot swan
they cannot swan 	I cannot be swaning
you cannot be swaning
he cannot be swaning
we cannot be swaning
you cannot be swaning
they cannot be swaning	I cannot have swaned
you cannot have swaned
he cannot have swaned
we cannot have swaned
you cannot have swaned
they cannot have swaned	I cannot have been swaning
you cannot have been swaning
he cannot have been swaning
we cannot have been swaning
you cannot have been swaning
they cannot have been swaning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I swan?
can you swan?
can he swan?
can we swan?
can you swan?
can they swan? 	can I be swaning?
can you be swaning?
can he be swaning?
can we be swaning?
can you be swaning?
can they be swaning? 	can I have swaned?
can you have swaned?
can he 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 he 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 	Perfect 	V-ing perfect 	
can I not swan?
can you not swan?
can he not swan?
can we not swan?
can you not swan?
can they not swan? 	can I not be swaning?
can you not be swaning?
can he not be swaning?
can we not be swaning?
can you not be swaning?
can they not be swaning? 	can I not have swaned?
can you not have swaned?
can he not have swaned?
can we not have swaned?
can you not have swaned?
can they not have swaned? 	can I not have been swaning?
can you not have been swaning?
can he not have been swaning?
can we not have been swaning?
can you not have been swaning?
can they not have been swaning?