English verb conjugation
COULD EXTRAPOLATE

Regular verb: extrapolate - extrapolated - extrapolated

Affirmation

Simple form	V-ing form
I could extrapolate you could extrapolate she could extrapolate we could extrapolate you could extrapolate they could extrapolate	I could be extrapolating you could be extrapolating she 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 she 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 she 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 couldn't extrapolate you couldn't extrapolate she couldn't extrapolate we couldn't extrapolate you couldn't extrapolate they couldn't extrapolate	I couldn't be extrapolating you couldn't be extrapolating she couldn't be extrapolating we couldn't be extrapolating you couldn't be extrapolating they couldn't be extrapolating
Perfect	V-ing perfect
I couldn't have extrapolated you couldn't have extrapolated she couldn't have extrapolated we couldn't have extrapolated you couldn't have extrapolated they couldn't have extrapolated	I couldn't have been extrapolating you couldn't have been extrapolating she couldn't have been extrapolating we couldn't have been extrapolating you couldn't have been extrapolating they couldn't have been extrapolating

Interrogative form

Simple form	V-ing form
could I extrapolate? could you extrapolate? could she extrapolate? could we extrapolate? could you extrapolate? could they extrapolate?	could I be extrapolating? could you be extrapolating? could she 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 she 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 she 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
couldn't I extrapolate? couldn't you extrapolate? couldn't she extrapolate? couldn't we extrapolate? couldn't you extrapolate? couldn't they extrapolate?	couldn't I be extrapolating? couldn't you be extrapolating? couldn't she be extrapolating? couldn't we be extrapolating? couldn't you be extrapolating? couldn't they be extrapolating?
Perfect	V-ing perfect
couldn't I have extrapolated? couldn't you have extrapolated? couldn't she have extrapolated? couldn't we have extrapolated? couldn't you have extrapolated? couldn't they have extrapolated?	couldn't I have been extrapolating? couldn't you have been extrapolating? couldn't she have been extrapolating? couldn't we have been extrapolating? couldn't you have been extrapolating? couldn't they have been extrapolating?