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