English verb conjugation
CAN YOWL

Regular verb: yowl - yowled - yowled

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?