could moan
Regular verb: moan - moaned- moaned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could moan
you could moan
she could moan
we could moan
you could moan
they could moan 	I could be moaning
you could be moaning
she could be moaning
we could be moaning
you could be moaning
they could be moaning	I could have moaned
you could have moaned
she could have moaned
we could have moaned
you could have moaned
they could have moaned	I could have been moaning
you could have been moaning
she could have been moaning
we could have been moaning
you could have been moaning
they could have been moaning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not moan
you could not moan
she could not moan
we could not moan
you could not moan
they could not moan 	I could not be moaning
you could not be moaning
she could not be moaning
we could not be moaning
you could not be moaning
they could not be moaning	I could not have moaned
you could not have moaned
she could not have moaned
we could not have moaned
you could not have moaned
they could not have moaned	I could not have been moaning
you could not have been moaning
she could not have been moaning
we could not have been moaning
you could not have been moaning
they could not have been moaning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I moan?
could you moan?
could she moan?
could we moan?
could you moan?
could they moan? 	could I be moaning?
could you be moaning?
could she be moaning?
could we be moaning?
could you be moaning?
could they be moaning? 	could I have moaned?
could you have moaned?
could she have moaned?
could we have moaned?
could you have moaned?
could they have moaned? 	could I have been moaning?
could you have been moaning?
could she have been moaning?
could we have been moaning?
could you have been moaning?
could they have been moaning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not moan?
could you not moan?
could she not moan?
could we not moan?
could you not moan?
could they not moan? 	could I not be moaning?
could you not be moaning?
could she not be moaning?
could we not be moaning?
could you not be moaning?
could they not be moaning? 	could I not have moaned?
could you not have moaned?
could she not have moaned?
could we not have moaned?
could you not have moaned?
could they not have moaned? 	could I not have been moaning?
could you not have been moaning?
could she not have been moaning?
could we not have been moaning?
could you not have been moaning?
could they not have been moaning?