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