English verb conjugation
CAN CONCEAL

Regular verb: conceal - concealed - concealed

Affirmation

Simple form	V-ing form
I can conceal you can conceal he can conceal we can conceal you can conceal they can conceal	I can be concealing you can be concealing he can be concealing we can be concealing you can be concealing they can be concealing
Perfect	V-ing perfect
I can have concealed you can have concealed he can have concealed we can have concealed you can have concealed they can have concealed	I can have been concealing you can have been concealing he can have been concealing we can have been concealing you can have been concealing they can have been concealing

Negation

Simple form	V-ing form
I can't conceal you can't conceal he can't conceal we can't conceal you can't conceal they can't conceal	I can't be concealing you can't be concealing he can't be concealing we can't be concealing you can't be concealing they can't be concealing
Perfect	V-ing perfect
I can't have concealed you can't have concealed he can't have concealed we can't have concealed you can't have concealed they can't have concealed	I can't have been concealing you can't have been concealing he can't have been concealing we can't have been concealing you can't have been concealing they can't have been concealing

Interrogative form

Simple form	V-ing form
can I conceal? can you conceal? can he conceal? can we conceal? can you conceal? can they conceal?	can I be concealing? can you be concealing? can he be concealing? can we be concealing? can you be concealing? can they be concealing?
Perfect	V-ing perfect
can I have concealed? can you have concealed? can he have concealed? can we have concealed? can you have concealed? can they have concealed?	can I have been concealing? can you have been concealing? can he have been concealing? can we have been concealing? can you have been concealing? can they have been concealing?

Interro-negative form

Simple form	V-ing form
can't I conceal? can't you conceal? can't he conceal? can't we conceal? can't you conceal? can't they conceal?	can't I be concealing? can't you be concealing? can't he be concealing? can't we be concealing? can't you be concealing? can't they be concealing?
Perfect	V-ing perfect
can't I have concealed? can't you have concealed? can't he have concealed? can't we have concealed? can't you have concealed? can't they have concealed?	can't I have been concealing? can't you have been concealing? can't he have been concealing? can't we have been concealing? can't you have been concealing? can't they have been concealing?