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