can yowl
Regular verb: yowl - yowled- yowled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can yowl
you can yowl
he can yowl
we can yowl
you can yowl
they can yowl 	I can be yowling
you can be yowling
he can be yowling
we can be yowling
you can be yowling
they can be yowling	I can have yowled
you can have yowled
he can have yowled
we can have yowled
you can have yowled
they can have yowled	I can have been yowling
you can have been yowling
he can have been yowling
we can have been yowling
you can have been yowling
they can have been yowling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't yowl
you can't yowl
he can't yowl
we can't yowl
you can't yowl
they can't yowl 	I can't be yowling
you can't be yowling
he can't be yowling
we can't be yowling
you can't be yowling
they can't be yowling	I can't have yowled
you can't have yowled
he can't have yowled
we can't have yowled
you can't have yowled
they can't have yowled	I can't have been yowling
you can't have been yowling
he can't have been yowling
we can't have been yowling
you can't have been yowling
they can't have been yowling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I yowl?
can you yowl?
can he yowl?
can we yowl?
can you yowl?
can they yowl? 	can I be yowling?
can you be yowling?
can he be yowling?
can we be yowling?
can you be yowling?
can they be yowling? 	can I have yowled?
can you have yowled?
can he have yowled?
can we have yowled?
can you have yowled?
can they have yowled? 	can I have been yowling?
can you have been yowling?
can he have been yowling?
can we have been yowling?
can you have been yowling?
can they have been yowling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I yowl?
can't you yowl?
can't he yowl?
can't we yowl?
can't you yowl?
can't they yowl? 	can't I be yowling?
can't you be yowling?
can't he be yowling?
can't we be yowling?
can't you be yowling?
can't they be yowling? 	can't I have yowled?
can't you have yowled?
can't he have yowled?
can't we have yowled?
can't you have yowled?
can't they have yowled? 	can't I have been yowling?
can't you have been yowling?
can't he have been yowling?
can't we have been yowling?
can't you have been yowling?
can't they have been yowling?