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