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 cannot yowl you cannot yowl he cannot yowl we cannot yowl you cannot yowl they cannot yowl	I cannot be yowling you cannot be yowling he cannot be yowling we cannot be yowling you cannot be yowling they cannot be yowling
Perfect	V-ing perfect
I cannot have yowled you cannot have yowled he cannot have yowled we cannot have yowled you cannot have yowled they cannot have yowled	I cannot have been yowling you cannot have been yowling he cannot have been yowling we cannot have been yowling you cannot have been yowling they cannot 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 I not yowl? can you not yowl? can he not yowl? can we not yowl? can you not yowl? can they not yowl?	can I not be yowling? can you not be yowling? can he not be yowling? can we not be yowling? can you not be yowling? can they not be yowling?
Perfect	V-ing perfect
can I not have yowled? can you not have yowled? can he not have yowled? can we not have yowled? can you not have yowled? can they not have yowled?	can I not have been yowling? can you not have been yowling? can he not have been yowling? can we not have been yowling? can you not have been yowling? can they not have been yowling?