English verb conjugation
COULD EXTOLL

Regular verb: extoll - extolled - extolled

Affirmation

Simple form	V-ing form
I could extoll you could extoll he could extoll we could extoll you could extoll they could extoll	I could be extolling you could be extolling he could be extolling we could be extolling you could be extolling they could be extolling
Perfect	V-ing perfect
I could have extolled you could have extolled he could have extolled we could have extolled you could have extolled they could have extolled	I could have been extolling you could have been extolling he could have been extolling we could have been extolling you could have been extolling they could have been extolling

Negation

Simple form	V-ing form
I could not extoll you could not extoll he could not extoll we could not extoll you could not extoll they could not extoll	I could not be extolling you could not be extolling he could not be extolling we could not be extolling you could not be extolling they could not be extolling
Perfect	V-ing perfect
I could not have extolled you could not have extolled he could not have extolled we could not have extolled you could not have extolled they could not have extolled	I could not have been extolling you could not have been extolling he could not have been extolling we could not have been extolling you could not have been extolling they could not have been extolling

Interrogative form

Simple form	V-ing form
could I extoll? could you extoll? could he extoll? could we extoll? could you extoll? could they extoll?	could I be extolling? could you be extolling? could he be extolling? could we be extolling? could you be extolling? could they be extolling?
Perfect	V-ing perfect
could I have extolled? could you have extolled? could he have extolled? could we have extolled? could you have extolled? could they have extolled?	could I have been extolling? could you have been extolling? could he have been extolling? could we have been extolling? could you have been extolling? could they have been extolling?

Interro-negative form

Simple form	V-ing form
could I not extoll? could you not extoll? could he not extoll? could we not extoll? could you not extoll? could they not extoll?	could I not be extolling? could you not be extolling? could he not be extolling? could we not be extolling? could you not be extolling? could they not be extolling?
Perfect	V-ing perfect
could I not have extolled? could you not have extolled? could he not have extolled? could we not have extolled? could you not have extolled? could they not have extolled?	could I not have been extolling? could you not have been extolling? could he not have been extolling? could we not have been extolling? could you not have been extolling? could they not have been extolling?