I could exclude you could exclude he could exclude we could exclude you could exclude they could exclude
V-ing form
I could be excluding you could be excluding he could be excluding we could be excluding you could be excluding they could be excluding
Perfect
I could have excluded you could have excluded he could have excluded we could have excluded you could have excluded they could have excluded
V-ing perfect
I could have been excluding you could have been excluding he could have been excluding we could have been excluding you could have been excluding they could have been excluding
Negation
Simple form
I could not exclude you could not exclude he could not exclude we could not exclude you could not exclude they could not exclude
V-ing form
I could not be excluding you could not be excluding he could not be excluding we could not be excluding you could not be excluding they could not be excluding
Perfect
I could not have excluded you could not have excluded he could not have excluded we could not have excluded you could not have excluded they could not have excluded
V-ing perfect
I could not have been excluding you could not have been excluding he could not have been excluding we could not have been excluding you could not have been excluding they could not have been excluding
Interrogative form
Simple form
could I exclude? could you exclude? could he exclude? could we exclude? could you exclude? could they exclude?
V-ing form
could I be excluding? could you be excluding? could he be excluding? could we be excluding? could you be excluding? could they be excluding?
Perfect
could I have excluded? could you have excluded? could he have excluded? could we have excluded? could you have excluded? could they have excluded?
V-ing perfect
could I have been excluding? could you have been excluding? could he have been excluding? could we have been excluding? could you have been excluding? could they have been excluding?
Interro-negative form
Simple form
could I not exclude? could you not exclude? could he not exclude? could we not exclude? could you not exclude? could they not exclude?
V-ing form
could I not be excluding? could you not be excluding? could he not be excluding? could we not be excluding? could you not be excluding? could they not be excluding?
Perfect
could I not have excluded? could you not have excluded? could he not have excluded? could we not have excluded? could you not have excluded? could they not have excluded?
V-ing perfect
could I not have been excluding? could you not have been excluding? could he not have been excluding? could we not have been excluding? could you not have been excluding? could they not have been excluding?