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