I can grouse you can grouse he can grouse we can grouse you can grouse they can grouse
V-ing form
I can be grousing you can be grousing he can be grousing we can be grousing you can be grousing they can be grousing
Perfect
I can have groused you can have groused he can have groused we can have groused you can have groused they can have groused
V-ing perfect
I can have been grousing you can have been grousing he can have been grousing we can have been grousing you can have been grousing they can have been grousing
Negation
Simple form
I cannot grouse you cannot grouse he cannot grouse we cannot grouse you cannot grouse they cannot grouse
V-ing form
I cannot be grousing you cannot be grousing he cannot be grousing we cannot be grousing you cannot be grousing they cannot be grousing
Perfect
I cannot have groused you cannot have groused he cannot have groused we cannot have groused you cannot have groused they cannot have groused
V-ing perfect
I cannot have been grousing you cannot have been grousing he cannot have been grousing we cannot have been grousing you cannot have been grousing they cannot have been grousing
Interrogative form
Simple form
can I grouse? can you grouse? can he grouse? can we grouse? can you grouse? can they grouse?
V-ing form
can I be grousing? can you be grousing? can he be grousing? can we be grousing? can you be grousing? can they be grousing?
Perfect
can I have groused? can you have groused? can he have groused? can we have groused? can you have groused? can they have groused?
V-ing perfect
can I have been grousing? can you have been grousing? can he have been grousing? can we have been grousing? can you have been grousing? can they have been grousing?
Interro-negative form
Simple form
can I not grouse? can you not grouse? can he not grouse? can we not grouse? can you not grouse? can they not grouse?
V-ing form
can I not be grousing? can you not be grousing? can he not be grousing? can we not be grousing? can you not be grousing? can they not be grousing?
Perfect
can I not have groused? can you not have groused? can he not have groused? can we not have groused? can you not have groused? can they not have groused?
V-ing perfect
can I not have been grousing? can you not have been grousing? can he not have been grousing? can we not have been grousing? can you not have been grousing? can they not have been grousing?