could elaborate
Regular verb: elaborate - elaborated- elaborated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could elaborate
you could elaborate
she could elaborate
we could elaborate
you could elaborate
they could elaborate 	I could be elaborating
you could be elaborating
she could be elaborating
we could be elaborating
you could be elaborating
they could be elaborating	I could have elaborated
you could have elaborated
she could have elaborated
we could have elaborated
you could have elaborated
they could have elaborated	I could have been elaborating
you could have been elaborating
she could have been elaborating
we could have been elaborating
you could have been elaborating
they could have been elaborating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not elaborate
you could not elaborate
she could not elaborate
we could not elaborate
you could not elaborate
they could not elaborate 	I could not be elaborating
you could not be elaborating
she could not be elaborating
we could not be elaborating
you could not be elaborating
they could not be elaborating	I could not have elaborated
you could not have elaborated
she could not have elaborated
we could not have elaborated
you could not have elaborated
they could not have elaborated	I could not have been elaborating
you could not have been elaborating
she could not have been elaborating
we could not have been elaborating
you could not have been elaborating
they could not have been elaborating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I elaborate?
could you elaborate?
could she elaborate?
could we elaborate?
could you elaborate?
could they elaborate? 	could I be elaborating?
could you be elaborating?
could she be elaborating?
could we be elaborating?
could you be elaborating?
could they be elaborating? 	could I have elaborated?
could you have elaborated?
could she have elaborated?
could we have elaborated?
could you have elaborated?
could they have elaborated? 	could I have been elaborating?
could you have been elaborating?
could she have been elaborating?
could we have been elaborating?
could you have been elaborating?
could they have been elaborating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not elaborate?
could you not elaborate?
could she not elaborate?
could we not elaborate?
could you not elaborate?
could they not elaborate? 	could I not be elaborating?
could you not be elaborating?
could she not be elaborating?
could we not be elaborating?
could you not be elaborating?
could they not be elaborating? 	could I not have elaborated?
could you not have elaborated?
could she not have elaborated?
could we not have elaborated?
could you not have elaborated?
could they not have elaborated? 	could I not have been elaborating?
could you not have been elaborating?
could she not have been elaborating?
could we not have been elaborating?
could you not have been elaborating?
could they not have been elaborating?