can extract
Regular verb: extract - extracted- extracted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can extract
you can extract
she can extract
we can extract
you can extract
they can extract 	I can be extracting
you can be extracting
she can be extracting
we can be extracting
you can be extracting
they can be extracting	I can have extracted
you can have extracted
she can have extracted
we can have extracted
you can have extracted
they can have extracted	I can have been extracting
you can have been extracting
she can have been extracting
we can have been extracting
you can have been extracting
they can have been extracting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't extract
you can't extract
she can't extract
we can't extract
you can't extract
they can't extract 	I can't be extracting
you can't be extracting
she can't be extracting
we can't be extracting
you can't be extracting
they can't be extracting	I can't have extracted
you can't have extracted
she can't have extracted
we can't have extracted
you can't have extracted
they can't have extracted	I can't have been extracting
you can't have been extracting
she can't have been extracting
we can't have been extracting
you can't have been extracting
they can't have been extracting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I extract?
can you extract?
can she extract?
can we extract?
can you extract?
can they extract? 	can I be extracting?
can you be extracting?
can she be extracting?
can we be extracting?
can you be extracting?
can they be extracting? 	can I have extracted?
can you have extracted?
can she have extracted?
can we have extracted?
can you have extracted?
can they have extracted? 	can I have been extracting?
can you have been extracting?
can she have been extracting?
can we have been extracting?
can you have been extracting?
can they have been extracting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I extract?
can't you extract?
can't she extract?
can't we extract?
can't you extract?
can't they extract? 	can't I be extracting?
can't you be extracting?
can't she be extracting?
can't we be extracting?
can't you be extracting?
can't they be extracting? 	can't I have extracted?
can't you have extracted?
can't she have extracted?
can't we have extracted?
can't you have extracted?
can't they have extracted? 	can't I have been extracting?
can't you have been extracting?
can't she have been extracting?
can't we have been extracting?
can't you have been extracting?
can't they have been extracting?