I could flour you could flour she could flour we could flour you could flour they could flour
V-ing form
I could be flouring you could be flouring she could be flouring we could be flouring you could be flouring they could be flouring
Perfect
I could have floured you could have floured she could have floured we could have floured you could have floured they could have floured
V-ing perfect
I could have been flouring you could have been flouring she could have been flouring we could have been flouring you could have been flouring they could have been flouring
Negation
Simple form
I could not flour you could not flour she could not flour we could not flour you could not flour they could not flour
V-ing form
I could not be flouring you could not be flouring she could not be flouring we could not be flouring you could not be flouring they could not be flouring
Perfect
I could not have floured you could not have floured she could not have floured we could not have floured you could not have floured they could not have floured
V-ing perfect
I could not have been flouring you could not have been flouring she could not have been flouring we could not have been flouring you could not have been flouring they could not have been flouring
Interrogative form
Simple form
could I flour? could you flour? could she flour? could we flour? could you flour? could they flour?
V-ing form
could I be flouring? could you be flouring? could she be flouring? could we be flouring? could you be flouring? could they be flouring?
Perfect
could I have floured? could you have floured? could she have floured? could we have floured? could you have floured? could they have floured?
V-ing perfect
could I have been flouring? could you have been flouring? could she have been flouring? could we have been flouring? could you have been flouring? could they have been flouring?
Interro-negative form
Simple form
could I not flour? could you not flour? could she not flour? could we not flour? could you not flour? could they not flour?
V-ing form
could I not be flouring? could you not be flouring? could she not be flouring? could we not be flouring? could you not be flouring? could they not be flouring?
Perfect
could I not have floured? could you not have floured? could she not have floured? could we not have floured? could you not have floured? could they not have floured?
V-ing perfect
could I not have been flouring? could you not have been flouring? could she not have been flouring? could we not have been flouring? could you not have been flouring? could they not have been flouring?