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