English verb conjugation
COULD EXTENUATE

Regular verb: extenuate - extenuated - extenuated

Affirmation

Simple form	V-ing form
I could extenuate you could extenuate he could extenuate we could extenuate you could extenuate they could extenuate	I could be extenuating you could be extenuating he could be extenuating we could be extenuating you could be extenuating they could be extenuating
Perfect	V-ing perfect
I could have extenuated you could have extenuated he could have extenuated we could have extenuated you could have extenuated they could have extenuated	I could have been extenuating you could have been extenuating he could have been extenuating we could have been extenuating you could have been extenuating they could have been extenuating

Negation

Simple form	V-ing form
I couldn't extenuate you couldn't extenuate he couldn't extenuate we couldn't extenuate you couldn't extenuate they couldn't extenuate	I couldn't be extenuating you couldn't be extenuating he couldn't be extenuating we couldn't be extenuating you couldn't be extenuating they couldn't be extenuating
Perfect	V-ing perfect
I couldn't have extenuated you couldn't have extenuated he couldn't have extenuated we couldn't have extenuated you couldn't have extenuated they couldn't have extenuated	I couldn't have been extenuating you couldn't have been extenuating he couldn't have been extenuating we couldn't have been extenuating you couldn't have been extenuating they couldn't have been extenuating

Interrogative form

Simple form	V-ing form
could I extenuate? could you extenuate? could he extenuate? could we extenuate? could you extenuate? could they extenuate?	could I be extenuating? could you be extenuating? could he be extenuating? could we be extenuating? could you be extenuating? could they be extenuating?
Perfect	V-ing perfect
could I have extenuated? could you have extenuated? could he have extenuated? could we have extenuated? could you have extenuated? could they have extenuated?	could I have been extenuating? could you have been extenuating? could he have been extenuating? could we have been extenuating? could you have been extenuating? could they have been extenuating?

Interro-negative form

Simple form	V-ing form
couldn't I extenuate? couldn't you extenuate? couldn't he extenuate? couldn't we extenuate? couldn't you extenuate? couldn't they extenuate?	couldn't I be extenuating? couldn't you be extenuating? couldn't he be extenuating? couldn't we be extenuating? couldn't you be extenuating? couldn't they be extenuating?
Perfect	V-ing perfect
couldn't I have extenuated? couldn't you have extenuated? couldn't he have extenuated? couldn't we have extenuated? couldn't you have extenuated? couldn't they have extenuated?	couldn't I have been extenuating? couldn't you have been extenuating? couldn't he have been extenuating? couldn't we have been extenuating? couldn't you have been extenuating? couldn't they have been extenuating?