I can growl you can growl he can growl we can growl you can growl they can growl
V-ing form
I can be growling you can be growling he can be growling we can be growling you can be growling they can be growling
Perfect
I can have growled you can have growled he can have growled we can have growled you can have growled they can have growled
V-ing perfect
I can have been growling you can have been growling he can have been growling we can have been growling you can have been growling they can have been growling
Negation
Simple form
I can't growl you can't growl he can't growl we can't growl you can't growl they can't growl
V-ing form
I can't be growling you can't be growling he can't be growling we can't be growling you can't be growling they can't be growling
Perfect
I can't have growled you can't have growled he can't have growled we can't have growled you can't have growled they can't have growled
V-ing perfect
I can't have been growling you can't have been growling he can't have been growling we can't have been growling you can't have been growling they can't have been growling
Interrogative form
Simple form
can I growl? can you growl? can he growl? can we growl? can you growl? can they growl?
V-ing form
can I be growling? can you be growling? can he be growling? can we be growling? can you be growling? can they be growling?
Perfect
can I have growled? can you have growled? can he have growled? can we have growled? can you have growled? can they have growled?
V-ing perfect
can I have been growling? can you have been growling? can he have been growling? can we have been growling? can you have been growling? can they have been growling?
Interro-negative form
Simple form
can't I growl? can't you growl? can't he growl? can't we growl? can't you growl? can't they growl?
V-ing form
can't I be growling? can't you be growling? can't he be growling? can't we be growling? can't you be growling? can't they be growling?
Perfect
can't I have growled? can't you have growled? can't he have growled? can't we have growled? can't you have growled? can't they have growled?
V-ing perfect
can't I have been growling? can't you have been growling? can't he have been growling? can't we have been growling? can't you have been growling? can't they have been growling?