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 couldn't extoll you couldn't extoll he couldn't extoll we couldn't extoll you couldn't extoll they couldn't extoll	I couldn't be extolling you couldn't be extolling he couldn't be extolling we couldn't be extolling you couldn't be extolling they couldn't be extolling
Perfect	V-ing perfect
I couldn't have extolled you couldn't have extolled he couldn't have extolled we couldn't have extolled you couldn't have extolled they couldn't have extolled	I couldn't have been extolling you couldn't have been extolling he couldn't have been extolling we couldn't have been extolling you couldn't have been extolling they couldn't 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
couldn't I extoll? couldn't you extoll? couldn't he extoll? couldn't we extoll? couldn't you extoll? couldn't they extoll?	couldn't I be extolling? couldn't you be extolling? couldn't he be extolling? couldn't we be extolling? couldn't you be extolling? couldn't they be extolling?
Perfect	V-ing perfect
couldn't I have extolled? couldn't you have extolled? couldn't he have extolled? couldn't we have extolled? couldn't you have extolled? couldn't they have extolled?	couldn't I have been extolling? couldn't you have been extolling? couldn't he have been extolling? couldn't we have been extolling? couldn't you have been extolling? couldn't they have been extolling?