could grouse
Regular verb: grouse - groused- groused

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could grouse
you could grouse
she could grouse
we could grouse
you could grouse
they could grouse 	I could be grousing
you could be grousing
she could be grousing
we could be grousing
you could be grousing
they could be grousing	I could have groused
you could have groused
she could have groused
we could have groused
you could have groused
they could have groused	I could have been grousing
you could have been grousing
she could have been grousing
we could have been grousing
you could have been grousing
they could have been grousing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not grouse
you could not grouse
she could not grouse
we could not grouse
you could not grouse
they could not grouse 	I could not be grousing
you could not be grousing
she could not be grousing
we could not be grousing
you could not be grousing
they could not be grousing	I could not have groused
you could not have groused
she could not have groused
we could not have groused
you could not have groused
they could not have groused	I could not have been grousing
you could not have been grousing
she could not have been grousing
we could not have been grousing
you could not have been grousing
they could not have been grousing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I grouse?
could you grouse?
could she grouse?
could we grouse?
could you grouse?
could they grouse? 	could I be grousing?
could you be grousing?
could she be grousing?
could we be grousing?
could you be grousing?
could they be grousing? 	could I have groused?
could you have groused?
could she have groused?
could we have groused?
could you have groused?
could they have groused? 	could I have been grousing?
could you have been grousing?
could she have been grousing?
could we have been grousing?
could you have been grousing?
could they have been grousing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not grouse?
could you not grouse?
could she not grouse?
could we not grouse?
could you not grouse?
could they not grouse? 	could I not be grousing?
could you not be grousing?
could she not be grousing?
could we not be grousing?
could you not be grousing?
could they not be grousing? 	could I not have groused?
could you not have groused?
could she not have groused?
could we not have groused?
could you not have groused?
could they not have groused? 	could I not have been grousing?
could you not have been grousing?
could she not have been grousing?
could we not have been grousing?
could you not have been grousing?
could they not have been grousing?