I could enclose you could enclose she could enclose we could enclose you could enclose they could enclose
V-ing form
I could be enclosing you could be enclosing she could be enclosing we could be enclosing you could be enclosing they could be enclosing
Perfect
I could have enclosed you could have enclosed she could have enclosed we could have enclosed you could have enclosed they could have enclosed
V-ing perfect
I could have been enclosing you could have been enclosing she could have been enclosing we could have been enclosing you could have been enclosing they could have been enclosing
Negation
Simple form
I could not enclose you could not enclose she could not enclose we could not enclose you could not enclose they could not enclose
V-ing form
I could not be enclosing you could not be enclosing she could not be enclosing we could not be enclosing you could not be enclosing they could not be enclosing
Perfect
I could not have enclosed you could not have enclosed she could not have enclosed we could not have enclosed you could not have enclosed they could not have enclosed
V-ing perfect
I could not have been enclosing you could not have been enclosing she could not have been enclosing we could not have been enclosing you could not have been enclosing they could not have been enclosing
Interrogative form
Simple form
could I enclose? could you enclose? could she enclose? could we enclose? could you enclose? could they enclose?
V-ing form
could I be enclosing? could you be enclosing? could she be enclosing? could we be enclosing? could you be enclosing? could they be enclosing?
Perfect
could I have enclosed? could you have enclosed? could she have enclosed? could we have enclosed? could you have enclosed? could they have enclosed?
V-ing perfect
could I have been enclosing? could you have been enclosing? could she have been enclosing? could we have been enclosing? could you have been enclosing? could they have been enclosing?
Interro-negative form
Simple form
could I not enclose? could you not enclose? could she not enclose? could we not enclose? could you not enclose? could they not enclose?
V-ing form
could I not be enclosing? could you not be enclosing? could she not be enclosing? could we not be enclosing? could you not be enclosing? could they not be enclosing?
Perfect
could I not have enclosed? could you not have enclosed? could she not have enclosed? could we not have enclosed? could you not have enclosed? could they not have enclosed?
V-ing perfect
could I not have been enclosing? could you not have been enclosing? could she not have been enclosing? could we not have been enclosing? could you not have been enclosing? could they not have been enclosing?