I could aprise you could aprise she could aprise we could aprise you could aprise they could aprise
V-ing form
I could be aprising you could be aprising she could be aprising we could be aprising you could be aprising they could be aprising
Perfect
I could have aprised you could have aprised she could have aprised we could have aprised you could have aprised they could have aprised
V-ing perfect
I could have been aprising you could have been aprising she could have been aprising we could have been aprising you could have been aprising they could have been aprising
Negation
Simple form
I could not aprise you could not aprise she could not aprise we could not aprise you could not aprise they could not aprise
V-ing form
I could not be aprising you could not be aprising she could not be aprising we could not be aprising you could not be aprising they could not be aprising
Perfect
I could not have aprised you could not have aprised she could not have aprised we could not have aprised you could not have aprised they could not have aprised
V-ing perfect
I could not have been aprising you could not have been aprising she could not have been aprising we could not have been aprising you could not have been aprising they could not have been aprising
Interrogative form
Simple form
could I aprise? could you aprise? could she aprise? could we aprise? could you aprise? could they aprise?
V-ing form
could I be aprising? could you be aprising? could she be aprising? could we be aprising? could you be aprising? could they be aprising?
Perfect
could I have aprised? could you have aprised? could she have aprised? could we have aprised? could you have aprised? could they have aprised?
V-ing perfect
could I have been aprising? could you have been aprising? could she have been aprising? could we have been aprising? could you have been aprising? could they have been aprising?
Interro-negative form
Simple form
could I not aprise? could you not aprise? could she not aprise? could we not aprise? could you not aprise? could they not aprise?
V-ing form
could I not be aprising? could you not be aprising? could she not be aprising? could we not be aprising? could you not be aprising? could they not be aprising?
Perfect
could I not have aprised? could you not have aprised? could she not have aprised? could we not have aprised? could you not have aprised? could they not have aprised?
V-ing perfect
could I not have been aprising? could you not have been aprising? could she not have been aprising? could we not have been aprising? could you not have been aprising? could they not have been aprising?