English verb conjugation
CAN EXPAND

Regular verb: expand - expanded - expanded

Affirmation

Simple form	V-ing form
I can expand you can expand he can expand we can expand you can expand they can expand	I can be expanding you can be expanding he can be expanding we can be expanding you can be expanding they can be expanding
Perfect	V-ing perfect
I can have expanded you can have expanded he can have expanded we can have expanded you can have expanded they can have expanded	I can have been expanding you can have been expanding he can have been expanding we can have been expanding you can have been expanding they can have been expanding

Negation

Simple form	V-ing form
I cannot expand you cannot expand he cannot expand we cannot expand you cannot expand they cannot expand	I cannot be expanding you cannot be expanding he cannot be expanding we cannot be expanding you cannot be expanding they cannot be expanding
Perfect	V-ing perfect
I cannot have expanded you cannot have expanded he cannot have expanded we cannot have expanded you cannot have expanded they cannot have expanded	I cannot have been expanding you cannot have been expanding he cannot have been expanding we cannot have been expanding you cannot have been expanding they cannot have been expanding

Interrogative form

Simple form	V-ing form
can I expand? can you expand? can he expand? can we expand? can you expand? can they expand?	can I be expanding? can you be expanding? can he be expanding? can we be expanding? can you be expanding? can they be expanding?
Perfect	V-ing perfect
can I have expanded? can you have expanded? can he have expanded? can we have expanded? can you have expanded? can they have expanded?	can I have been expanding? can you have been expanding? can he have been expanding? can we have been expanding? can you have been expanding? can they have been expanding?

Interro-negative form

Simple form	V-ing form
can I not expand? can you not expand? can he not expand? can we not expand? can you not expand? can they not expand?	can I not be expanding? can you not be expanding? can he not be expanding? can we not be expanding? can you not be expanding? can they not be expanding?
Perfect	V-ing perfect
can I not have expanded? can you not have expanded? can he not have expanded? can we not have expanded? can you not have expanded? can they not have expanded?	can I not have been expanding? can you not have been expanding? can he not have been expanding? can we not have been expanding? can you not have been expanding? can they not have been expanding?