I can unseal you can unseal he can unseal we can unseal you can unseal they can unseal
V-ing form
I can be unsealing you can be unsealing he can be unsealing we can be unsealing you can be unsealing they can be unsealing
Perfect
I can have unsealed you can have unsealed he can have unsealed we can have unsealed you can have unsealed they can have unsealed
V-ing perfect
I can have been unsealing you can have been unsealing he can have been unsealing we can have been unsealing you can have been unsealing they can have been unsealing
Negation
Simple form
I can't unseal you can't unseal he can't unseal we can't unseal you can't unseal they can't unseal
V-ing form
I can't be unsealing you can't be unsealing he can't be unsealing we can't be unsealing you can't be unsealing they can't be unsealing
Perfect
I can't have unsealed you can't have unsealed he can't have unsealed we can't have unsealed you can't have unsealed they can't have unsealed
V-ing perfect
I can't have been unsealing you can't have been unsealing he can't have been unsealing we can't have been unsealing you can't have been unsealing they can't have been unsealing
Interrogative form
Simple form
can I unseal? can you unseal? can he unseal? can we unseal? can you unseal? can they unseal?
V-ing form
can I be unsealing? can you be unsealing? can he be unsealing? can we be unsealing? can you be unsealing? can they be unsealing?
Perfect
can I have unsealed? can you have unsealed? can he have unsealed? can we have unsealed? can you have unsealed? can they have unsealed?
V-ing perfect
can I have been unsealing? can you have been unsealing? can he have been unsealing? can we have been unsealing? can you have been unsealing? can they have been unsealing?
Interro-negative form
Simple form
can't I unseal? can't you unseal? can't he unseal? can't we unseal? can't you unseal? can't they unseal?
V-ing form
can't I be unsealing? can't you be unsealing? can't he be unsealing? can't we be unsealing? can't you be unsealing? can't they be unsealing?
Perfect
can't I have unsealed? can't you have unsealed? can't he have unsealed? can't we have unsealed? can't you have unsealed? can't they have unsealed?
V-ing perfect
can't I have been unsealing? can't you have been unsealing? can't he have been unsealing? can't we have been unsealing? can't you have been unsealing? can't they have been unsealing?