English verb conjugation
COULD GROUSE

Regular verb: grouse - groused - groused

Affirmation

Simple form	V-ing form
I could grouse you could grouse he could grouse we could grouse you could grouse they could grouse	I could be grousing you could be grousing he could be grousing we could be grousing you could be grousing they could be grousing
Perfect	V-ing perfect
I could have groused you could have groused he 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 he 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
I couldn't grouse you couldn't grouse he 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 he couldn't be grousing we couldn't be grousing you couldn't be grousing they couldn't be grousing
Perfect	V-ing perfect
I couldn't have groused you couldn't have groused he 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 he 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
could I grouse? could you grouse? could he grouse? could we grouse? could you grouse? could they grouse?	could I be grousing? could you be grousing? could he be grousing? could we be grousing? could you be grousing? could they be grousing?
Perfect	V-ing perfect
could I have groused? could you have groused? could he 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 he 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
couldn't I grouse? couldn't you grouse? couldn't he 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 he be grousing? couldn't we be grousing? couldn't you be grousing? couldn't they be grousing?
Perfect	V-ing perfect
couldn't I have groused? couldn't you have groused? couldn't he 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 he have been grousing? couldn't we have been grousing? couldn't you have been grousing? couldn't they have been grousing?