could extol
Regular verb: extol - extolled- extolled

Affirmation 	
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I could extol
you could extol
she could extol
we could extol
you could extol
they could extol 	I could be extolling
you could be extolling
she could be extolling
we could be extolling
you could be extolling
they could be extolling	I could have extolled
you could have extolled
she 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
she could have been extolling
we could have been extolling
you could have been extolling
they could have been extolling	

Negation 	
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I couldn't extol
you couldn't extol
she couldn't extol
we couldn't extol
you couldn't extol
they couldn't extol 	I couldn't be extolling
you couldn't be extolling
she couldn't be extolling
we couldn't be extolling
you couldn't be extolling
they couldn't be extolling	I couldn't have extolled
you couldn't have extolled
she 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
she 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 	Perfect 	V-ing perfect 	
could I extol?
could you extol?
could she extol?
could we extol?
could you extol?
could they extol? 	could I be extolling?
could you be extolling?
could she be extolling?
could we be extolling?
could you be extolling?
could they be extolling? 	could I have extolled?
could you have extolled?
could she 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 she 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 	Perfect 	V-ing perfect 	
couldn't I extol?
couldn't you extol?
couldn't she extol?
couldn't we extol?
couldn't you extol?
couldn't they extol? 	couldn't I be extolling?
couldn't you be extolling?
couldn't she be extolling?
couldn't we be extolling?
couldn't you be extolling?
couldn't they be extolling? 	couldn't I have extolled?
couldn't you have extolled?
couldn't she 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 she have been extolling?
couldn't we have been extolling?
couldn't you have been extolling?
couldn't they have been extolling?