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 cannot extract
you cannot extract
she cannot extract
we cannot extract
you cannot extract
they cannot extract 	I cannot be extracting
you cannot be extracting
she cannot be extracting
we cannot be extracting
you cannot be extracting
they cannot be extracting	I cannot have extracted
you cannot have extracted
she cannot have extracted
we cannot have extracted
you cannot have extracted
they cannot have extracted	I cannot have been extracting
you cannot have been extracting
she cannot have been extracting
we cannot have been extracting
you cannot have been extracting
they cannot 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 I not extract?
can you not extract?
can she not extract?
can we not extract?
can you not extract?
can they not extract? 	can I not be extracting?
can you not be extracting?
can she not be extracting?
can we not be extracting?
can you not be extracting?
can they not be extracting? 	can I not have extracted?
can you not have extracted?
can she not have extracted?
can we not have extracted?
can you not have extracted?
can they not have extracted? 	can I not have been extracting?
can you not have been extracting?
can she not have been extracting?
can we not have been extracting?
can you not have been extracting?
can they not have been extracting?