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