I could convey you could convey he could convey we could convey you could convey they could convey
V-ing form
I could be conveying you could be conveying he could be conveying we could be conveying you could be conveying they could be conveying
Perfect
I could have conveyed you could have conveyed he could have conveyed we could have conveyed you could have conveyed they could have conveyed
V-ing perfect
I could have been conveying you could have been conveying he could have been conveying we could have been conveying you could have been conveying they could have been conveying
Negation
Simple form
I could not convey you could not convey he could not convey we could not convey you could not convey they could not convey
V-ing form
I could not be conveying you could not be conveying he could not be conveying we could not be conveying you could not be conveying they could not be conveying
Perfect
I could not have conveyed you could not have conveyed he could not have conveyed we could not have conveyed you could not have conveyed they could not have conveyed
V-ing perfect
I could not have been conveying you could not have been conveying he could not have been conveying we could not have been conveying you could not have been conveying they could not have been conveying
Interrogative form
Simple form
could I convey? could you convey? could he convey? could we convey? could you convey? could they convey?
V-ing form
could I be conveying? could you be conveying? could he be conveying? could we be conveying? could you be conveying? could they be conveying?
Perfect
could I have conveyed? could you have conveyed? could he have conveyed? could we have conveyed? could you have conveyed? could they have conveyed?
V-ing perfect
could I have been conveying? could you have been conveying? could he have been conveying? could we have been conveying? could you have been conveying? could they have been conveying?
Interro-negative form
Simple form
could I not convey? could you not convey? could he not convey? could we not convey? could you not convey? could they not convey?
V-ing form
could I not be conveying? could you not be conveying? could he not be conveying? could we not be conveying? could you not be conveying? could they not be conveying?
Perfect
could I not have conveyed? could you not have conveyed? could he not have conveyed? could we not have conveyed? could you not have conveyed? could they not have conveyed?
V-ing perfect
could I not have been conveying? could you not have been conveying? could he not have been conveying? could we not have been conveying? could you not have been conveying? could they not have been conveying?