English verb conjugation
CAN SEAL

Regular verb: seal - sealed - sealed

Affirmation

Simple form	V-ing form
I can seal you can seal she can seal we can seal you can seal they can seal	I can be sealing you can be sealing she can be sealing we can be sealing you can be sealing they can be sealing
Perfect	V-ing perfect
I can have sealed you can have sealed she can have sealed we can have sealed you can have sealed they can have sealed	I can have been sealing you can have been sealing she can have been sealing we can have been sealing you can have been sealing they can have been sealing

Negation

Simple form	V-ing form
I can't seal you can't seal she can't seal we can't seal you can't seal they can't seal	I can't be sealing you can't be sealing she can't be sealing we can't be sealing you can't be sealing they can't be sealing
Perfect	V-ing perfect
I can't have sealed you can't have sealed she can't have sealed we can't have sealed you can't have sealed they can't have sealed	I can't have been sealing you can't have been sealing she can't have been sealing we can't have been sealing you can't have been sealing they can't have been sealing

Interrogative form

Simple form	V-ing form
can I seal? can you seal? can she seal? can we seal? can you seal? can they seal?	can I be sealing? can you be sealing? can she be sealing? can we be sealing? can you be sealing? can they be sealing?
Perfect	V-ing perfect
can I have sealed? can you have sealed? can she have sealed? can we have sealed? can you have sealed? can they have sealed?	can I have been sealing? can you have been sealing? can she have been sealing? can we have been sealing? can you have been sealing? can they have been sealing?

Interro-negative form

Simple form	V-ing form
can't I seal? can't you seal? can't she seal? can't we seal? can't you seal? can't they seal?	can't I be sealing? can't you be sealing? can't she be sealing? can't we be sealing? can't you be sealing? can't they be sealing?
Perfect	V-ing perfect
can't I have sealed? can't you have sealed? can't she have sealed? can't we have sealed? can't you have sealed? can't they have sealed?	can't I have been sealing? can't you have been sealing? can't she have been sealing? can't we have been sealing? can't you have been sealing? can't they have been sealing?