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 can't underseal you can't underseal he can't underseal we can't underseal you can't underseal they can't underseal	I can't be undersealing you can't be undersealing he can't be undersealing we can't be undersealing you can't be undersealing they can't be undersealing
Perfect	V-ing perfect
I can't have undersealed you can't have undersealed he can't have undersealed we can't have undersealed you can't have undersealed they can't have undersealed	I can't have been undersealing you can't have been undersealing he can't have been undersealing we can't have been undersealing you can't have been undersealing they can't 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't I underseal? can't you underseal? can't he underseal? can't we underseal? can't you underseal? can't they underseal?	can't I be undersealing? can't you be undersealing? can't he be undersealing? can't we be undersealing? can't you be undersealing? can't they be undersealing?
Perfect	V-ing perfect
can't I have undersealed? can't you have undersealed? can't he have undersealed? can't we have undersealed? can't you have undersealed? can't they have undersealed?	can't I have been undersealing? can't you have been undersealing? can't he have been undersealing? can't we have been undersealing? can't you have been undersealing? can't they have been undersealing?