English verb conjugation
CAN MAINTAIN

Regular verb: maintain - maintained - maintained

Affirmation

Simple form	V-ing form
I can maintain you can maintain he can maintain we can maintain you can maintain they can maintain	I can be maintaining you can be maintaining he can be maintaining we can be maintaining you can be maintaining they can be maintaining
Perfect	V-ing perfect
I can have maintained you can have maintained he can have maintained we can have maintained you can have maintained they can have maintained	I can have been maintaining you can have been maintaining he can have been maintaining we can have been maintaining you can have been maintaining they can have been maintaining

Negation

Simple form	V-ing form
I can't maintain you can't maintain he can't maintain we can't maintain you can't maintain they can't maintain	I can't be maintaining you can't be maintaining he can't be maintaining we can't be maintaining you can't be maintaining they can't be maintaining
Perfect	V-ing perfect
I can't have maintained you can't have maintained he can't have maintained we can't have maintained you can't have maintained they can't have maintained	I can't have been maintaining you can't have been maintaining he can't have been maintaining we can't have been maintaining you can't have been maintaining they can't have been maintaining

Interrogative form

Simple form	V-ing form
can I maintain? can you maintain? can he maintain? can we maintain? can you maintain? can they maintain?	can I be maintaining? can you be maintaining? can he be maintaining? can we be maintaining? can you be maintaining? can they be maintaining?
Perfect	V-ing perfect
can I have maintained? can you have maintained? can he have maintained? can we have maintained? can you have maintained? can they have maintained?	can I have been maintaining? can you have been maintaining? can he have been maintaining? can we have been maintaining? can you have been maintaining? can they have been maintaining?

Interro-negative form

Simple form	V-ing form
can't I maintain? can't you maintain? can't he maintain? can't we maintain? can't you maintain? can't they maintain?	can't I be maintaining? can't you be maintaining? can't he be maintaining? can't we be maintaining? can't you be maintaining? can't they be maintaining?
Perfect	V-ing perfect
can't I have maintained? can't you have maintained? can't he have maintained? can't we have maintained? can't you have maintained? can't they have maintained?	can't I have been maintaining? can't you have been maintaining? can't he have been maintaining? can't we have been maintaining? can't you have been maintaining? can't they have been maintaining?