I could convoy you could convoy he could convoy we could convoy you could convoy they could convoy
V-ing form
I could be convoying you could be convoying he could be convoying we could be convoying you could be convoying they could be convoying
Perfect
I could have convoyed you could have convoyed he could have convoyed we could have convoyed you could have convoyed they could have convoyed
V-ing perfect
I could have been convoying you could have been convoying he could have been convoying we could have been convoying you could have been convoying they could have been convoying
Negation
Simple form
I could not convoy you could not convoy he could not convoy we could not convoy you could not convoy they could not convoy
V-ing form
I could not be convoying you could not be convoying he could not be convoying we could not be convoying you could not be convoying they could not be convoying
Perfect
I could not have convoyed you could not have convoyed he could not have convoyed we could not have convoyed you could not have convoyed they could not have convoyed
V-ing perfect
I could not have been convoying you could not have been convoying he could not have been convoying we could not have been convoying you could not have been convoying they could not have been convoying
Interrogative form
Simple form
could I convoy? could you convoy? could he convoy? could we convoy? could you convoy? could they convoy?
V-ing form
could I be convoying? could you be convoying? could he be convoying? could we be convoying? could you be convoying? could they be convoying?
Perfect
could I have convoyed? could you have convoyed? could he have convoyed? could we have convoyed? could you have convoyed? could they have convoyed?
V-ing perfect
could I have been convoying? could you have been convoying? could he have been convoying? could we have been convoying? could you have been convoying? could they have been convoying?
Interro-negative form
Simple form
could I not convoy? could you not convoy? could he not convoy? could we not convoy? could you not convoy? could they not convoy?
V-ing form
could I not be convoying? could you not be convoying? could he not be convoying? could we not be convoying? could you not be convoying? could they not be convoying?
Perfect
could I not have convoyed? could you not have convoyed? could he not have convoyed? could we not have convoyed? could you not have convoyed? could they not have convoyed?
V-ing perfect
could I not have been convoying? could you not have been convoying? could he not have been convoying? could we not have been convoying? could you not have been convoying? could they not have been convoying?