can concoct
Regular verb: concoct - concocted- concocted

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