I could scutter you could scutter she could scutter we could scutter you could scutter they could scutter
V-ing form
I could be scuttering you could be scuttering she could be scuttering we could be scuttering you could be scuttering they could be scuttering
Perfect
I could have scuttered you could have scuttered she 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 she 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 she 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 she 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 she 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 she 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 she scutter? could we scutter? could you scutter? could they scutter?
V-ing form
could I be scuttering? could you be scuttering? could she be scuttering? could we be scuttering? could you be scuttering? could they be scuttering?
Perfect
could I have scuttered? could you have scuttered? could she 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 she 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 she 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 she 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 she 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 she have been scuttering? couldn't we have been scuttering? couldn't you have been scuttering? couldn't they have been scuttering?