could account
Regular verb: account - accounted- accounted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could account
you could account
he could account
we could account
you could account
they could account 	I could be accounting
you could be accounting
he could be accounting
we could be accounting
you could be accounting
they could be accounting	I could have accounted
you could have accounted
he could have accounted
we could have accounted
you could have accounted
they could have accounted	I could have been accounting
you could have been accounting
he could have been accounting
we could have been accounting
you could have been accounting
they could have been accounting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't account
you couldn't account
he couldn't account
we couldn't account
you couldn't account
they couldn't account 	I couldn't be accounting
you couldn't be accounting
he couldn't be accounting
we couldn't be accounting
you couldn't be accounting
they couldn't be accounting	I couldn't have accounted
you couldn't have accounted
he couldn't have accounted
we couldn't have accounted
you couldn't have accounted
they couldn't have accounted	I couldn't have been accounting
you couldn't have been accounting
he couldn't have been accounting
we couldn't have been accounting
you couldn't have been accounting
they couldn't have been accounting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I account?
could you account?
could he account?
could we account?
could you account?
could they account? 	could I be accounting?
could you be accounting?
could he be accounting?
could we be accounting?
could you be accounting?
could they be accounting? 	could I have accounted?
could you have accounted?
could he have accounted?
could we have accounted?
could you have accounted?
could they have accounted? 	could I have been accounting?
could you have been accounting?
could he have been accounting?
could we have been accounting?
could you have been accounting?
could they have been accounting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I account?
couldn't you account?
couldn't he account?
couldn't we account?
couldn't you account?
couldn't they account? 	couldn't I be accounting?
couldn't you be accounting?
couldn't he be accounting?
couldn't we be accounting?
couldn't you be accounting?
couldn't they be accounting? 	couldn't I have accounted?
couldn't you have accounted?
couldn't he have accounted?
couldn't we have accounted?
couldn't you have accounted?
couldn't they have accounted? 	couldn't I have been accounting?
couldn't you have been accounting?
couldn't he have been accounting?
couldn't we have been accounting?
couldn't you have been accounting?
couldn't they have been accounting?