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