English verb conjugation
COULD APPROXIMATE

Regular verb: approximate - approximated - approximated

Affirmation

Simple form	V-ing form
I could approximate you could approximate she could approximate we could approximate you could approximate they could approximate	I could be approximating you could be approximating she could be approximating we could be approximating you could be approximating they could be approximating
Perfect	V-ing perfect
I could have approximated you could have approximated she could have approximated we could have approximated you could have approximated they could have approximated	I could have been approximating you could have been approximating she could have been approximating we could have been approximating you could have been approximating they could have been approximating

Negation

Simple form	V-ing form
I could not approximate you could not approximate she could not approximate we could not approximate you could not approximate they could not approximate	I could not be approximating you could not be approximating she could not be approximating we could not be approximating you could not be approximating they could not be approximating
Perfect	V-ing perfect
I could not have approximated you could not have approximated she could not have approximated we could not have approximated you could not have approximated they could not have approximated	I could not have been approximating you could not have been approximating she could not have been approximating we could not have been approximating you could not have been approximating they could not have been approximating

Interrogative form

Simple form	V-ing form
could I approximate? could you approximate? could she approximate? could we approximate? could you approximate? could they approximate?	could I be approximating? could you be approximating? could she be approximating? could we be approximating? could you be approximating? could they be approximating?
Perfect	V-ing perfect
could I have approximated? could you have approximated? could she have approximated? could we have approximated? could you have approximated? could they have approximated?	could I have been approximating? could you have been approximating? could she have been approximating? could we have been approximating? could you have been approximating? could they have been approximating?

Interro-negative form

Simple form	V-ing form
could I not approximate? could you not approximate? could she not approximate? could we not approximate? could you not approximate? could they not approximate?	could I not be approximating? could you not be approximating? could she not be approximating? could we not be approximating? could you not be approximating? could they not be approximating?
Perfect	V-ing perfect
could I not have approximated? could you not have approximated? could she not have approximated? could we not have approximated? could you not have approximated? could they not have approximated?	could I not have been approximating? could you not have been approximating? could she not have been approximating? could we not have been approximating? could you not have been approximating? could they not have been approximating?