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