I could sequester you could sequester she could sequester we could sequester you could sequester they could sequester
V-ing form
I could be sequestering you could be sequestering she could be sequestering we could be sequestering you could be sequestering they could be sequestering
Perfect
I could have sequestered you could have sequestered she could have sequestered we could have sequestered you could have sequestered they could have sequestered
V-ing perfect
I could have been sequestering you could have been sequestering she could have been sequestering we could have been sequestering you could have been sequestering they could have been sequestering
Negation
Simple form
I could not sequester you could not sequester she could not sequester we could not sequester you could not sequester they could not sequester
V-ing form
I could not be sequestering you could not be sequestering she could not be sequestering we could not be sequestering you could not be sequestering they could not be sequestering
Perfect
I could not have sequestered you could not have sequestered she could not have sequestered we could not have sequestered you could not have sequestered they could not have sequestered
V-ing perfect
I could not have been sequestering you could not have been sequestering she could not have been sequestering we could not have been sequestering you could not have been sequestering they could not have been sequestering
Interrogative form
Simple form
could I sequester? could you sequester? could she sequester? could we sequester? could you sequester? could they sequester?
V-ing form
could I be sequestering? could you be sequestering? could she be sequestering? could we be sequestering? could you be sequestering? could they be sequestering?
Perfect
could I have sequestered? could you have sequestered? could she have sequestered? could we have sequestered? could you have sequestered? could they have sequestered?
V-ing perfect
could I have been sequestering? could you have been sequestering? could she have been sequestering? could we have been sequestering? could you have been sequestering? could they have been sequestering?
Interro-negative form
Simple form
could I not sequester? could you not sequester? could she not sequester? could we not sequester? could you not sequester? could they not sequester?
V-ing form
could I not be sequestering? could you not be sequestering? could she not be sequestering? could we not be sequestering? could you not be sequestering? could they not be sequestering?
Perfect
could I not have sequestered? could you not have sequestered? could she not have sequestered? could we not have sequestered? could you not have sequestered? could they not have sequestered?
V-ing perfect
could I not have been sequestering? could you not have been sequestering? could she not have been sequestering? could we not have been sequestering? could you not have been sequestering? could they not have been sequestering?