I can correspond you can correspond she can correspond we can correspond you can correspond they can correspond
V-ing form
I can be corresponding you can be corresponding she can be corresponding we can be corresponding you can be corresponding they can be corresponding
Perfect
I can have corresponded you can have corresponded she can have corresponded we can have corresponded you can have corresponded they can have corresponded
V-ing perfect
I can have been corresponding you can have been corresponding she can have been corresponding we can have been corresponding you can have been corresponding they can have been corresponding
Negation
Simple form
I cannot correspond you cannot correspond she cannot correspond we cannot correspond you cannot correspond they cannot correspond
V-ing form
I cannot be corresponding you cannot be corresponding she cannot be corresponding we cannot be corresponding you cannot be corresponding they cannot be corresponding
Perfect
I cannot have corresponded you cannot have corresponded she cannot have corresponded we cannot have corresponded you cannot have corresponded they cannot have corresponded
V-ing perfect
I cannot have been corresponding you cannot have been corresponding she cannot have been corresponding we cannot have been corresponding you cannot have been corresponding they cannot have been corresponding
Interrogative form
Simple form
can I correspond? can you correspond? can she correspond? can we correspond? can you correspond? can they correspond?
V-ing form
can I be corresponding? can you be corresponding? can she be corresponding? can we be corresponding? can you be corresponding? can they be corresponding?
Perfect
can I have corresponded? can you have corresponded? can she have corresponded? can we have corresponded? can you have corresponded? can they have corresponded?
V-ing perfect
can I have been corresponding? can you have been corresponding? can she have been corresponding? can we have been corresponding? can you have been corresponding? can they have been corresponding?
Interro-negative form
Simple form
can I not correspond? can you not correspond? can she not correspond? can we not correspond? can you not correspond? can they not correspond?
V-ing form
can I not be corresponding? can you not be corresponding? can she not be corresponding? can we not be corresponding? can you not be corresponding? can they not be corresponding?
Perfect
can I not have corresponded? can you not have corresponded? can she not have corresponded? can we not have corresponded? can you not have corresponded? can they not have corresponded?
V-ing perfect
can I not have been corresponding? can you not have been corresponding? can she not have been corresponding? can we not have been corresponding? can you not have been corresponding? can they not have been corresponding?