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 cannot conceal you cannot conceal he cannot conceal we cannot conceal you cannot conceal they cannot conceal	I cannot be concealing you cannot be concealing he cannot be concealing we cannot be concealing you cannot be concealing they cannot be concealing
Perfect	V-ing perfect
I cannot have concealed you cannot have concealed he cannot have concealed we cannot have concealed you cannot have concealed they cannot have concealed	I cannot have been concealing you cannot have been concealing he cannot have been concealing we cannot have been concealing you cannot have been concealing they cannot 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 I not conceal? can you not conceal? can he not conceal? can we not conceal? can you not conceal? can they not conceal?	can I not be concealing? can you not be concealing? can he not be concealing? can we not be concealing? can you not be concealing? can they not be concealing?
Perfect	V-ing perfect
can I not have concealed? can you not have concealed? can he not have concealed? can we not have concealed? can you not have concealed? can they not have concealed?	can I not have been concealing? can you not have been concealing? can he not have been concealing? can we not have been concealing? can you not have been concealing? can they not have been concealing?