English verb conjugation
CAN BURROW

Regular verb: burrow - burrowed - burrowed

Affirmation

Simple form	V-ing form
I can burrow you can burrow he can burrow we can burrow you can burrow they can burrow	I can be burrowing you can be burrowing he can be burrowing we can be burrowing you can be burrowing they can be burrowing
Perfect	V-ing perfect
I can have burrowed you can have burrowed he can have burrowed we can have burrowed you can have burrowed they can have burrowed	I can have been burrowing you can have been burrowing he can have been burrowing we can have been burrowing you can have been burrowing they can have been burrowing

Negation

Simple form	V-ing form
I can't burrow you can't burrow he can't burrow we can't burrow you can't burrow they can't burrow	I can't be burrowing you can't be burrowing he can't be burrowing we can't be burrowing you can't be burrowing they can't be burrowing
Perfect	V-ing perfect
I can't have burrowed you can't have burrowed he can't have burrowed we can't have burrowed you can't have burrowed they can't have burrowed	I can't have been burrowing you can't have been burrowing he can't have been burrowing we can't have been burrowing you can't have been burrowing they can't have been burrowing

Interrogative form

Simple form	V-ing form
can I burrow? can you burrow? can he burrow? can we burrow? can you burrow? can they burrow?	can I be burrowing? can you be burrowing? can he be burrowing? can we be burrowing? can you be burrowing? can they be burrowing?
Perfect	V-ing perfect
can I have burrowed? can you have burrowed? can he have burrowed? can we have burrowed? can you have burrowed? can they have burrowed?	can I have been burrowing? can you have been burrowing? can he have been burrowing? can we have been burrowing? can you have been burrowing? can they have been burrowing?

Interro-negative form

Simple form	V-ing form
can't I burrow? can't you burrow? can't he burrow? can't we burrow? can't you burrow? can't they burrow?	can't I be burrowing? can't you be burrowing? can't he be burrowing? can't we be burrowing? can't you be burrowing? can't they be burrowing?
Perfect	V-ing perfect
can't I have burrowed? can't you have burrowed? can't he have burrowed? can't we have burrowed? can't you have burrowed? can't they have burrowed?	can't I have been burrowing? can't you have been burrowing? can't he have been burrowing? can't we have been burrowing? can't you have been burrowing? can't they have been burrowing?