I could sequester you could sequester he could sequester we could sequester you could sequester they could sequester
V-ing form
I could be sequestering you could be sequestering he could be sequestering we could be sequestering you could be sequestering they could be sequestering
Perfect
I could have sequestered you could have sequestered he 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 he could have been sequestering we could have been sequestering you could have been sequestering they could have been sequestering
Negation
Simple form
I couldn't sequester you couldn't sequester he couldn't sequester we couldn't sequester you couldn't sequester they couldn't sequester
V-ing form
I couldn't be sequestering you couldn't be sequestering he couldn't be sequestering we couldn't be sequestering you couldn't be sequestering they couldn't be sequestering
Perfect
I couldn't have sequestered you couldn't have sequestered he couldn't have sequestered we couldn't have sequestered you couldn't have sequestered they couldn't have sequestered
V-ing perfect
I couldn't have been sequestering you couldn't have been sequestering he couldn't have been sequestering we couldn't have been sequestering you couldn't have been sequestering they couldn't have been sequestering
Interrogative form
Simple form
could I sequester? could you sequester? could he sequester? could we sequester? could you sequester? could they sequester?
V-ing form
could I be sequestering? could you be sequestering? could he be sequestering? could we be sequestering? could you be sequestering? could they be sequestering?
Perfect
could I have sequestered? could you have sequestered? could he 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 he have been sequestering? could we have been sequestering? could you have been sequestering? could they have been sequestering?
Interro-negative form
Simple form
couldn't I sequester? couldn't you sequester? couldn't he sequester? couldn't we sequester? couldn't you sequester? couldn't they sequester?
V-ing form
couldn't I be sequestering? couldn't you be sequestering? couldn't he be sequestering? couldn't we be sequestering? couldn't you be sequestering? couldn't they be sequestering?
Perfect
couldn't I have sequestered? couldn't you have sequestered? couldn't he have sequestered? couldn't we have sequestered? couldn't you have sequestered? couldn't they have sequestered?
V-ing perfect
couldn't I have been sequestering? couldn't you have been sequestering? couldn't he have been sequestering? couldn't we have been sequestering? couldn't you have been sequestering? couldn't they have been sequestering?