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 couldn't grouse
you couldn't grouse
she couldn't grouse
we couldn't grouse
you couldn't grouse
they couldn't grouse 	I couldn't be grousing
you couldn't be grousing
she couldn't be grousing
we couldn't be grousing
you couldn't be grousing
they couldn't be grousing	I couldn't have groused
you couldn't have groused
she couldn't have groused
we couldn't have groused
you couldn't have groused
they couldn't have groused	I couldn't have been grousing
you couldn't have been grousing
she couldn't have been grousing
we couldn't have been grousing
you couldn't have been grousing
they couldn't 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 	
couldn't I grouse?
couldn't you grouse?
couldn't she grouse?
couldn't we grouse?
couldn't you grouse?
couldn't they grouse? 	couldn't I be grousing?
couldn't you be grousing?
couldn't she be grousing?
couldn't we be grousing?
couldn't you be grousing?
couldn't they be grousing? 	couldn't I have groused?
couldn't you have groused?
couldn't she have groused?
couldn't we have groused?
couldn't you have groused?
couldn't they have groused? 	couldn't I have been grousing?
couldn't you have been grousing?
couldn't she have been grousing?
couldn't we have been grousing?
couldn't you have been grousing?
couldn't they have been grousing?