I could grommet you could grommet she could grommet we could grommet you could grommet they could grommet
V-ing form
I could be grommeting you could be grommeting she could be grommeting we could be grommeting you could be grommeting they could be grommeting
Perfect
I could have grommeted you could have grommeted she could have grommeted we could have grommeted you could have grommeted they could have grommeted
V-ing perfect
I could have been grommeting you could have been grommeting she could have been grommeting we could have been grommeting you could have been grommeting they could have been grommeting
Negation
Simple form
I could not grommet you could not grommet she could not grommet we could not grommet you could not grommet they could not grommet
V-ing form
I could not be grommeting you could not be grommeting she could not be grommeting we could not be grommeting you could not be grommeting they could not be grommeting
Perfect
I could not have grommeted you could not have grommeted she could not have grommeted we could not have grommeted you could not have grommeted they could not have grommeted
V-ing perfect
I could not have been grommeting you could not have been grommeting she could not have been grommeting we could not have been grommeting you could not have been grommeting they could not have been grommeting
Interrogative form
Simple form
could I grommet? could you grommet? could she grommet? could we grommet? could you grommet? could they grommet?
V-ing form
could I be grommeting? could you be grommeting? could she be grommeting? could we be grommeting? could you be grommeting? could they be grommeting?
Perfect
could I have grommeted? could you have grommeted? could she have grommeted? could we have grommeted? could you have grommeted? could they have grommeted?
V-ing perfect
could I have been grommeting? could you have been grommeting? could she have been grommeting? could we have been grommeting? could you have been grommeting? could they have been grommeting?
Interro-negative form
Simple form
could I not grommet? could you not grommet? could she not grommet? could we not grommet? could you not grommet? could they not grommet?
V-ing form
could I not be grommeting? could you not be grommeting? could she not be grommeting? could we not be grommeting? could you not be grommeting? could they not be grommeting?
Perfect
could I not have grommeted? could you not have grommeted? could she not have grommeted? could we not have grommeted? could you not have grommeted? could they not have grommeted?
V-ing perfect
could I not have been grommeting? could you not have been grommeting? could she not have been grommeting? could we not have been grommeting? could you not have been grommeting? could they not have been grommeting?