English verb conjugation
CAN CONCOCT

Regular verb: concoct - concocted - concocted

Affirmation

Simple form	V-ing form
I can concoct you can concoct he can concoct we can concoct you can concoct they can concoct	I can be concocting you can be concocting he can be concocting we can be concocting you can be concocting they can be concocting
Perfect	V-ing perfect
I can have concocted you can have concocted he can have concocted we can have concocted you can have concocted they can have concocted	I can have been concocting you can have been concocting he can have been concocting we can have been concocting you can have been concocting they can have been concocting

Negation

Simple form	V-ing form
I can't concoct you can't concoct he can't concoct we can't concoct you can't concoct they can't concoct	I can't be concocting you can't be concocting he can't be concocting we can't be concocting you can't be concocting they can't be concocting
Perfect	V-ing perfect
I can't have concocted you can't have concocted he can't have concocted we can't have concocted you can't have concocted they can't have concocted	I can't have been concocting you can't have been concocting he can't have been concocting we can't have been concocting you can't have been concocting they can't have been concocting

Interrogative form

Simple form	V-ing form
can I concoct? can you concoct? can he concoct? can we concoct? can you concoct? can they concoct?	can I be concocting? can you be concocting? can he be concocting? can we be concocting? can you be concocting? can they be concocting?
Perfect	V-ing perfect
can I have concocted? can you have concocted? can he have concocted? can we have concocted? can you have concocted? can they have concocted?	can I have been concocting? can you have been concocting? can he have been concocting? can we have been concocting? can you have been concocting? can they have been concocting?

Interro-negative form

Simple form	V-ing form
can't I concoct? can't you concoct? can't he concoct? can't we concoct? can't you concoct? can't they concoct?	can't I be concocting? can't you be concocting? can't he be concocting? can't we be concocting? can't you be concocting? can't they be concocting?
Perfect	V-ing perfect
can't I have concocted? can't you have concocted? can't he have concocted? can't we have concocted? can't you have concocted? can't they have concocted?	can't I have been concocting? can't you have been concocting? can't he have been concocting? can't we have been concocting? can't you have been concocting? can't they have been concocting?