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