English verb conjugation
COULD EXTRAPOLATE

Regular verb: extrapolate - extrapolated - extrapolated

Affirmation

Simple form	V-ing form
I could extrapolate you could extrapolate he could extrapolate we could extrapolate you could extrapolate they could extrapolate	I could be extrapolating you could be extrapolating he could be extrapolating we could be extrapolating you could be extrapolating they could be extrapolating
Perfect	V-ing perfect
I could have extrapolated you could have extrapolated he could have extrapolated we could have extrapolated you could have extrapolated they could have extrapolated	I could have been extrapolating you could have been extrapolating he could have been extrapolating we could have been extrapolating you could have been extrapolating they could have been extrapolating

Negation

Simple form	V-ing form
I could not extrapolate you could not extrapolate he could not extrapolate we could not extrapolate you could not extrapolate they could not extrapolate	I could not be extrapolating you could not be extrapolating he could not be extrapolating we could not be extrapolating you could not be extrapolating they could not be extrapolating
Perfect	V-ing perfect
I could not have extrapolated you could not have extrapolated he could not have extrapolated we could not have extrapolated you could not have extrapolated they could not have extrapolated	I could not have been extrapolating you could not have been extrapolating he could not have been extrapolating we could not have been extrapolating you could not have been extrapolating they could not have been extrapolating

Interrogative form

Simple form	V-ing form
could I extrapolate? could you extrapolate? could he extrapolate? could we extrapolate? could you extrapolate? could they extrapolate?	could I be extrapolating? could you be extrapolating? could he be extrapolating? could we be extrapolating? could you be extrapolating? could they be extrapolating?
Perfect	V-ing perfect
could I have extrapolated? could you have extrapolated? could he have extrapolated? could we have extrapolated? could you have extrapolated? could they have extrapolated?	could I have been extrapolating? could you have been extrapolating? could he have been extrapolating? could we have been extrapolating? could you have been extrapolating? could they have been extrapolating?

Interro-negative form

Simple form	V-ing form
could I not extrapolate? could you not extrapolate? could he not extrapolate? could we not extrapolate? could you not extrapolate? could they not extrapolate?	could I not be extrapolating? could you not be extrapolating? could he not be extrapolating? could we not be extrapolating? could you not be extrapolating? could they not be extrapolating?
Perfect	V-ing perfect
could I not have extrapolated? could you not have extrapolated? could he not have extrapolated? could we not have extrapolated? could you not have extrapolated? could they not have extrapolated?	could I not have been extrapolating? could you not have been extrapolating? could he not have been extrapolating? could we not have been extrapolating? could you not have been extrapolating? could they not have been extrapolating?