I could permit you could permit she could permit we could permit you could permit they could permit
V-ing form
I could be permitting you could be permitting she could be permitting we could be permitting you could be permitting they could be permitting
Perfect
I could have permitted you could have permitted she could have permitted we could have permitted you could have permitted they could have permitted
V-ing perfect
I could have been permitting you could have been permitting she could have been permitting we could have been permitting you could have been permitting they could have been permitting
Negation
Simple form
I couldn't permit you couldn't permit she couldn't permit we couldn't permit you couldn't permit they couldn't permit
V-ing form
I couldn't be permitting you couldn't be permitting she couldn't be permitting we couldn't be permitting you couldn't be permitting they couldn't be permitting
Perfect
I couldn't have permitted you couldn't have permitted she couldn't have permitted we couldn't have permitted you couldn't have permitted they couldn't have permitted
V-ing perfect
I couldn't have been permitting you couldn't have been permitting she couldn't have been permitting we couldn't have been permitting you couldn't have been permitting they couldn't have been permitting
Interrogative form
Simple form
could I permit? could you permit? could she permit? could we permit? could you permit? could they permit?
V-ing form
could I be permitting? could you be permitting? could she be permitting? could we be permitting? could you be permitting? could they be permitting?
Perfect
could I have permitted? could you have permitted? could she have permitted? could we have permitted? could you have permitted? could they have permitted?
V-ing perfect
could I have been permitting? could you have been permitting? could she have been permitting? could we have been permitting? could you have been permitting? could they have been permitting?
Interro-negative form
Simple form
couldn't I permit? couldn't you permit? couldn't she permit? couldn't we permit? couldn't you permit? couldn't they permit?
V-ing form
couldn't I be permitting? couldn't you be permitting? couldn't she be permitting? couldn't we be permitting? couldn't you be permitting? couldn't they be permitting?
Perfect
couldn't I have permitted? couldn't you have permitted? couldn't she have permitted? couldn't we have permitted? couldn't you have permitted? couldn't they have permitted?
V-ing perfect
couldn't I have been permitting? couldn't you have been permitting? couldn't she have been permitting? couldn't we have been permitting? couldn't you have been permitting? couldn't they have been permitting?