English verb conjugation
CAN UNDERSEAL

Regular verb: underseal - undersealed - undersealed

Affirmation

Simple form	V-ing form
I can underseal you can underseal he can underseal we can underseal you can underseal they can underseal	I can be undersealing you can be undersealing he can be undersealing we can be undersealing you can be undersealing they can be undersealing
Perfect	V-ing perfect
I can have undersealed you can have undersealed he can have undersealed we can have undersealed you can have undersealed they can have undersealed	I can have been undersealing you can have been undersealing he can have been undersealing we can have been undersealing you can have been undersealing they can have been undersealing

Negation

Simple form	V-ing form
I cannot underseal you cannot underseal he cannot underseal we cannot underseal you cannot underseal they cannot underseal	I cannot be undersealing you cannot be undersealing he cannot be undersealing we cannot be undersealing you cannot be undersealing they cannot be undersealing
Perfect	V-ing perfect
I cannot have undersealed you cannot have undersealed he cannot have undersealed we cannot have undersealed you cannot have undersealed they cannot have undersealed	I cannot have been undersealing you cannot have been undersealing he cannot have been undersealing we cannot have been undersealing you cannot have been undersealing they cannot have been undersealing

Interrogative form

Simple form	V-ing form
can I underseal? can you underseal? can he underseal? can we underseal? can you underseal? can they underseal?	can I be undersealing? can you be undersealing? can he be undersealing? can we be undersealing? can you be undersealing? can they be undersealing?
Perfect	V-ing perfect
can I have undersealed? can you have undersealed? can he have undersealed? can we have undersealed? can you have undersealed? can they have undersealed?	can I have been undersealing? can you have been undersealing? can he have been undersealing? can we have been undersealing? can you have been undersealing? can they have been undersealing?

Interro-negative form

Simple form	V-ing form
can I not underseal? can you not underseal? can he not underseal? can we not underseal? can you not underseal? can they not underseal?	can I not be undersealing? can you not be undersealing? can he not be undersealing? can we not be undersealing? can you not be undersealing? can they not be undersealing?
Perfect	V-ing perfect
can I not have undersealed? can you not have undersealed? can he not have undersealed? can we not have undersealed? can you not have undersealed? can they not have undersealed?	can I not have been undersealing? can you not have been undersealing? can he not have been undersealing? can we not have been undersealing? can you not have been undersealing? can they not have been undersealing?