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