could expostulate
Regular verb: expostulate - expostulated- expostulated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could expostulate
you could expostulate
she could expostulate
we could expostulate
you could expostulate
they could expostulate 	I could be expostulating
you could be expostulating
she could be expostulating
we could be expostulating
you could be expostulating
they could be expostulating	I could have expostulated
you could have expostulated
she could have expostulated
we could have expostulated
you could have expostulated
they could have expostulated	I could have been expostulating
you could have been expostulating
she could have been expostulating
we could have been expostulating
you could have been expostulating
they could have been expostulating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not expostulate
you could not expostulate
she could not expostulate
we could not expostulate
you could not expostulate
they could not expostulate 	I could not be expostulating
you could not be expostulating
she could not be expostulating
we could not be expostulating
you could not be expostulating
they could not be expostulating	I could not have expostulated
you could not have expostulated
she could not have expostulated
we could not have expostulated
you could not have expostulated
they could not have expostulated	I could not have been expostulating
you could not have been expostulating
she could not have been expostulating
we could not have been expostulating
you could not have been expostulating
they could not have been expostulating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I expostulate?
could you expostulate?
could she expostulate?
could we expostulate?
could you expostulate?
could they expostulate? 	could I be expostulating?
could you be expostulating?
could she be expostulating?
could we be expostulating?
could you be expostulating?
could they be expostulating? 	could I have expostulated?
could you have expostulated?
could she have expostulated?
could we have expostulated?
could you have expostulated?
could they have expostulated? 	could I have been expostulating?
could you have been expostulating?
could she have been expostulating?
could we have been expostulating?
could you have been expostulating?
could they have been expostulating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not expostulate?
could you not expostulate?
could she not expostulate?
could we not expostulate?
could you not expostulate?
could they not expostulate? 	could I not be expostulating?
could you not be expostulating?
could she not be expostulating?
could we not be expostulating?
could you not be expostulating?
could they not be expostulating? 	could I not have expostulated?
could you not have expostulated?
could she not have expostulated?
could we not have expostulated?
could you not have expostulated?
could they not have expostulated? 	could I not have been expostulating?
could you not have been expostulating?
could she not have been expostulating?
could we not have been expostulating?
could you not have been expostulating?
could they not have been expostulating?