English verb conjugation
CAN EXTRACT

Regular verb: extract - extracted - extracted

Affirmation

Simple form	V-ing form
I can extract you can extract he can extract we can extract you can extract they can extract	I can be extracting you can be extracting he can be extracting we can be extracting you can be extracting they can be extracting
Perfect	V-ing perfect
I can have extracted you can have extracted he 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 he 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
I cannot extract you cannot extract he cannot extract we cannot extract you cannot extract they cannot extract	I cannot be extracting you cannot be extracting he cannot be extracting we cannot be extracting you cannot be extracting they cannot be extracting
Perfect	V-ing perfect
I cannot have extracted you cannot have extracted he 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 he 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
can I extract? can you extract? can he extract? can we extract? can you extract? can they extract?	can I be extracting? can you be extracting? can he be extracting? can we be extracting? can you be extracting? can they be extracting?
Perfect	V-ing perfect
can I have extracted? can you have extracted? can he 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 he 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
can I not extract? can you not extract? can he 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 he not be extracting? can we not be extracting? can you not be extracting? can they not be extracting?
Perfect	V-ing perfect
can I not have extracted? can you not have extracted? can he 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 he not have been extracting? can we not have been extracting? can you not have been extracting? can they not have been extracting?