I could apprise you could apprise he could apprise we could apprise you could apprise they could apprise
V-ing form
I could be apprising you could be apprising he could be apprising we could be apprising you could be apprising they could be apprising
Perfect
I could have apprised you could have apprised he could have apprised we could have apprised you could have apprised they could have apprised
V-ing perfect
I could have been apprising you could have been apprising he could have been apprising we could have been apprising you could have been apprising they could have been apprising
Negation
Simple form
I couldn't apprise you couldn't apprise he couldn't apprise we couldn't apprise you couldn't apprise they couldn't apprise
V-ing form
I couldn't be apprising you couldn't be apprising he couldn't be apprising we couldn't be apprising you couldn't be apprising they couldn't be apprising
Perfect
I couldn't have apprised you couldn't have apprised he couldn't have apprised we couldn't have apprised you couldn't have apprised they couldn't have apprised
V-ing perfect
I couldn't have been apprising you couldn't have been apprising he couldn't have been apprising we couldn't have been apprising you couldn't have been apprising they couldn't have been apprising
Interrogative form
Simple form
could I apprise? could you apprise? could he apprise? could we apprise? could you apprise? could they apprise?
V-ing form
could I be apprising? could you be apprising? could he be apprising? could we be apprising? could you be apprising? could they be apprising?
Perfect
could I have apprised? could you have apprised? could he have apprised? could we have apprised? could you have apprised? could they have apprised?
V-ing perfect
could I have been apprising? could you have been apprising? could he have been apprising? could we have been apprising? could you have been apprising? could they have been apprising?
Interro-negative form
Simple form
couldn't I apprise? couldn't you apprise? couldn't he apprise? couldn't we apprise? couldn't you apprise? couldn't they apprise?
V-ing form
couldn't I be apprising? couldn't you be apprising? couldn't he be apprising? couldn't we be apprising? couldn't you be apprising? couldn't they be apprising?
Perfect
couldn't I have apprised? couldn't you have apprised? couldn't he have apprised? couldn't we have apprised? couldn't you have apprised? couldn't they have apprised?
V-ing perfect
couldn't I have been apprising? couldn't you have been apprising? couldn't he have been apprising? couldn't we have been apprising? couldn't you have been apprising? couldn't they have been apprising?